PHYSICAL EDUCATION

(Sample Question Paper, Set–I )

Code No.048

M.M. 70 Class XII Time 3 Hrs

“Solved Question Paper”

All questions are compulsory.

Question paper carries two parts namely Part A & B.

Part A

Q.1. How an individual is benefited with fitness and wellness. Explain the principles of fitness.

2+2+6

Ans.

It is known that fitness and wellness makes an individual physically fit, mentally stable and helps becoming a good citizen. Fitness helps individual achieve satisfactory level of strength, endurance and flexibility. It further improves the confidence and energy level. One feels more energetic and fresh for the whole day. It also leads to sound sleep followed by more relaxed body which leading to mental satisfaction and social stability. Body becomes more resistant to general ailments. Fitness improves efficiency of heart and lungs by improving cardio-respiratory fitness. It helps in maintaining normal blood pressure of the body. In nutshell, we can say – fitness and wellness helps to achieve the aim of physical education i.e. – “All round development of personality of the individual.”

Principles of fitness:-

1. Before taking any fitness programme one go for medical check-up.2. One can take-up the fitness program at any age.

3. Fitness program must be scientifically chalked out depending on age, sex and ability.

4. Programme must be simple to complex.

5. Avoid eating or drinking during a fitness session.

6. Safety must be given priority during the programme.

7. There should be proper gap between the meal and training session.

8. Avoid uncomfortable clothing during the exercise.

9. Avoid overstress and workout according to your need and capacity.

10. The most important principle of developing physical fitness is the principle of overload.

Q.2. Circuit training consists of exercises performed with or without apparatus. Draw a diagram of circuit training along with stations. What are the main characteristics of circuit training?

5+5

Ans.

“Circuit – Training “

Characteristics of circuit – training:-

1. Do the correct movements. Wrong and incorrect movements may be harmful.

2. Follow the principle – “Simple to complex.” i.e. – First do the simple exercise and move towards the complex one.

3. Do the exercise with your 80-100% efficiency.

4. Number of repetitions may vary according to need and efficiency.

5. The aim should be development of strength endurance and flexibility.

6. Do the exercise in a manner so that all body parts can be exercised.

7. Increase the intensity and volume of exercises gradually.

8. Don’t repeat the same circuit, change exercise at the stations as per requirement of your game.

9. To make the sessions interesting do it in small group of players.

10. Avoid injury oriented equipments and exercises.

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Q.3. Specify the role of sociology in sports. How physical education programme leads to leadership and value education?

2+4+4

Ans.

Role of Sociology in Sports:-

Sociology is derived out of Latin word “societus” meaning society and Greek word “logus” meaning study of science. It means sociology is the science of society.

Definition of Sociology: - Sociology is the study of relationship of men with his environment.

Definition of Sports-Sociology:- Sports Sociology is the study of origin, development, organization and role of sports in human society.

Role of Sociology in Sports:

As Aristotle said “Man is a social animal.” A child born, live in the family and home, go to the school, learn to adjust and develop himself socially. Sports activities are mostly group activities offering many opportunities for socialization and development of social qualities in individuals, the child plays with his peers, get acquainted with the behaviour of other children. He learns language and various modes of movements like running, jumping, chasing, shouting, struggling etc. Exchange of toys and words, feeling of giving and receiving. In this way group play leads to socialization. Through sociology athletes learns and develop qualities of co-operation and healthy competition.

Sociology leads to character development also. Through sociology individual learns independence, confidence, solving problems with peers. He also develops the qualities of friendship, popularity, mutual understanding and leadership. In competitions the athletes learns to face odds, to be couraged, to be obedient, to be self confident etc. One realizes through sociology that both competition and co-operation are important for all round development of an individual. It helps physical education teachers to develop traits of social behaviour among players. It helps in development of moral character of athletes.

Leadership and value Education

It is true that Physical Education programmes leads to leadership and value education, while playing every player try to prove his identity, whether it is an individual sport or team event. Every player tries to show excellence to prove – The Best. Best means the Leader. Every player wants to perform so as to become leader of the team and in individual sport the player wants to win – to prove supremacy. Or we can say winner is the leader. There are some other activities like NCC, Scouts and Guides, Camping etc. that helps individual to learn new thing to survive and to spend the life with intelligence.

Through Physical Education and sports the individual become not only physically fit and mentally sound but also he develops essential values for life like – strong moral character, co-operation, forgiveness, self-respect, support, care belongingness, respect for seniors and teachers etc. In present scenario it is observed that the students lack in values but with participation in games and sports they are likely to develop these values that help them become a good person and a responsible citizen.

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OR

Q3. “Games and sports as cultural heritage” Justify.

10

Ans.

“Games and sports as Cultural Heritage”

Culture consists of the behaviour that individuals develop as a result of living in a particular group. It is a way of life and a product of our social in

heritance. Our culture consists of our ways of living, eating habits, thoughts, customs, traditions, morals, art, literature, religion, games and sports and many other aspects of life. Our modern culture is not a product of sudden change or development, but has been evolved over centuries of the past. It is therefore a sort of reflection of our past. Therefore, games and sports of modern times are also indicators of the primitive times. Such activities have been passed on to us by our ancestors and are therefore our cultural heritage.

History of physical activities of man is as old as civilization itself. Most of the activities of primitive men were of physical nature and were aimed to secure means of existence. Activities included running, jumping, fighting, fishing and wrestling etc.

Such activities were essential for fighting enemies and procuring food. However, with the passage of time and formation of groups and institutions, some games and dances were added for the purpose of enjoyment and recreation. Games and sports activities of modern times are modified forms of the past activities of our ancestors and have been passed on to us as part of our cultural heritage. Some of the items of modern sports competitions, such as boxing etc. originated in the past.

Our modern culture is a mixture of many cultures of the ancient world. Many countries of the world have contributed in its evolution through their thoughts and practices. In this respect, contributions of early Egyptians, Greeks, and countries of the west cannot be forgotten. Most of the games and activities of today are the outcome of the contributions of these countries.

Gymnastic activities of modern times are the contribution of Germans. Germany gave us heavy gymnastics apparatus like horizontal bar, vaulting horse and parallel bars etc.. The British are considered to be the originators of ball games. They introduced games of football, hockey and cricket. The British helped in spreading these games around the world.

America introduced games of volleyball, basketball and baseball. There emphasis on physical fitness is worth admiring.

There are references of activities like archery, wrestling and games like “Shatranj” in Indian history from the times of Mahabharata. There are also references of games like “Kabaddi” and “Kho-Kho” having been played in the past. All such activities of the past are part of our physical activities today.

Thus, we can say that games, sports and other physical activities of modern times are not a creation of modern thought and practice, but are a legacy of

our ancient culture. We have simply modified these games and activities to refine them and suit our convenience. In fact the cultural heritage of the past show us the methods of surviving in this changing world.

Q.4. Describe the following:

(i) Sports environment

(ii) Essential elements of sports environment

(iii) Role of individual in improving sports environment

(iv) Prevention of sports related accidents

(v) Physical education as a medium to improve sports environment

2x5

Ans.

(i) Sports Environment:- Sports environment means availability of proper infrastructure, equipments and conducive ambience for sports. For example if a player is provided with proper ground, equipments, trainer/ Coach and experienced or senior players to practice or complete with he would learn and perform better and will give his best in sports.

(ii) Essential elements of sports environment:- In a school essential element of sports environment can be as follows:-

(a) Ground for outdoor sports.

(b) Indoor Hall.

(c) Swimming Pool.

(d) Necessary safe Equipments.

(e) Qualified Physical Education teachers and specialized coaches.

(f) Inter School Competitions.

(iii) Role of individual in improving sports environment:-

The individual can be a player, the captain of the team or sports captain of the school. They can motivate other students to play and participate in the games and sports by telling them the benefits of sports. Because motivation by peer group can be real source of energy for improving sports environment.

(iv) Prevention of Sports related accidents:-

In this the Physical Education Teachers and Trainers/ Coaches play very important role. They shall see that there is no obstacle in the ground. The ground is neat, clean and leveled. The equipment must be safe. The training should be done in organized manner. Extra attention should be given to injury oriented sports like Cricket, Hockey, Football, Archery, Javelin Throw, Discus Throw, Shot-put etc. The most important is not to leave students unattended. The Physical Education Teacher should be there to provide help at the time of injury or accident that may happen during the game.

(v) Physical Education as a medium to improve sports environment:-

Physical Education is one of the important ways to improve sports environment. The Physical Education professional can play the main and important role improving sports environment. They should provide theoretical and practical knowledge of Physical Education and Sports so that children learn more and interest for sports and games be created. This will increase participation and will help in improving sports environment in the school.

Q.5. While describing the terms yoga and asanas, explain the role of yoga for improving performance in competitive sports.

3+3+4

Ans.

Yoga- Yoga means "union of soul with the God." The word ‘Yog’ is derived from Sanskrit word "Yuj", which means to join or union or to bind. In other words "union of soul with God". The correct meaning of yoga is to perform a task with excellence is called Yoga.

Asana- Asana is the third step of Yoga. In Astanga Yoga, after achieving Yama and Viyayama, the Yogi starts asana or Yogic postures. Asanas are very helpful in maintaining good health. We can divide asana (poses) in following parts.

(a). Developing Postures.

(b). Meditative Postures.

(c). Relaxtative Postures.

Role of Yoga for improving performance in competitive sports-

1. Flexibility

2. Strength

3. Endurance

4. Balance and rhythm

5. Meditation

6. Relaxation

Asana- Asana means holding the body in a particular posture to bring stability to the body and poise to mind. The practice of asana bring firmness to the body and vitality to the body and the mind.

Role of yoga for improving performance in competitive sports:-

By doing yoga regularly along with other fitness methods, it is very helpful in developing certain aspects of fitness that can improve performance in competitive sports.

1. Improvement in flexibility - Regular practice of yoga helps in improving joint range of motion that improves overall flexibility. Flexibility is a motor component without which a player is not complete for desired standards.

2. Strength and Endurance:- Regular practice of yoga helps in improving general strength and endurance. Asanas provide strength to certain muscles and breathing processes like Pranayama helps in improving breathing capacity and lungs become more efficient resulting in improved performance.

3. Balance and Rhythm - Regular practice of asanas helps in improving balance and rhythm of the body.

4. Meditation:- Meditation helps in improving concentration of the players towards their goal. The player become psychologically strong by meditating for high achievement.

5. Relaxation:- After each training session and practice, a player need to relax. Yoga and asanas are the best way to relax.

6. At the time of injury and in off Season:- At the time when a player is injured, he can maintain his fitness through certain asana. During off season, a player can maintain his fitness and strengthen his muscles through yoga without getting stressed.

PART B

Q.1. What do you understand by first aid of sports injuries? Explain sprain, strain, abrasion and fracture.

2x5

Ans.

First aid of sports – injuries:-

On the spot help / assistance / treatment provided to the injured player in the ground / arena at the place of injury is called first aid of sport injury.

Normally, except in the case of fracture, the initial treatment for an injury for 24-48 hours is through PRICES (Prevention, Rest, Ice, Compression, Elevation and Support).

Sprain - Injury to ligament is called sprain.

Strain – Injury to muscles and tendons is called strain.

Classification of sprain and strain

1. Ist Degree – Fibour destruction is nil.

2. IInd Degree – Fibour destruction is moderate.

3. IIIrd Degree – Total destruction of fibour.

Symptoms of strain and sprain

1. Pain 2. Swelling 3. Loss of movement

In acute injury – usually pain is more.

In chronic injury – Pain is less, swelling is more.

Treatment

For Ist and IInd Degree

1. PRICE – Prevention, Rest, Ice, Compression, Elevation, Support

2. Physiotherapy.

For IIIrd Degree – Surgery

For muscles – Catgut surgery.

For ligaments – Silk or metallic wire is used for surgery.

Abrasion – Abrasion is a superficial injury of skin due to rubbing or scraping.

Causes – The main reason of abrasion is falling on hard or rough surface.

Abrasion may be because of constant irritation of skin by ill fitted shoes, rough fabric, seams in clothing or other parts of sports equipment such as helmets and pads.

Fractures – Fractures is defined as discontinuity in bone.

Type

1. Simple fracture.

2. Compound fracture.

3. Communicate fracture.

Fractures may be :-

1. Transverse fracture.

2. Oblique fracture.

3. Spiral fracture.

4. Compressor fracture.

Principle of treatment in plaster:-

1. To reduce Odessa.

2. To relieve pain.

3. Maintenance of circulation.

4. To teach the patient to use special appliances

Q.2. Write the following about the game/sport of your choice (any five):

(i) List of fundamental skills

(ii) Two specific warming up exercises

(iii) Two terminologies of the game/sport

(iv) Name of two sports awards conferred by Govt. of India in the game

(v) Two important tournaments and venues for last two years

(vi) Name of two personalities with brief out line of their achievements

(vii) Latest changes in the rules of game/sport

2x5

Ans.

(i) List of fundamental skills

(a) The grip

(b) Stance

(c) Drop

(d) Lob

(e) Smash

(f) Drive

(g) Clear

(ii) Two specific warming up exercises

(a) Shuttle – run

(b) Footwork / Shadow – practice

(iii) Two terminologies of the game/sport

(a) Rally

(b) Deuce

(iv) Name of two sports awards conferred by Govt. of India in the game

(a) Arjuna Award

(b) Padma Shri

(v) Two important tournaments and venues for last two years

(a) All England Championship

(b) Thomas and Uber Cup

(vi) Name of two personalities with brief out line of their achievements

(a) Prakash Padukone (National and all England Champion)

(b) P Gopichand (National and All England Champion)

(vii) Latest changes in the rules of game/sport

(a) Earlier the game was played with 15 – points game. Now the game is of 21- points.

Earlier if server did the fault the serve was changed. Now every fault is scored.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@CBSE Syllabus Class 12 for 2010 : Physics

Physics : CBSE syllabus class 12 for March 2010 examinations.

COURSE STRUCTURE

Class XII (Theory) PHYSICS

One Paper Time: 3 Hours 70 Marks

Unit - Marks

Unit I Electrostatics - 08

Unit II Current Electricity - 07

Unit III Magnetic effect of current & Magnetism - 08

Unit IV Electromagnetic Induction and Alternating current - 08

Unit V Electromagnetic Waves - 03

Unit VI Optics - 14

Unit VII Dual Nature of Matter - 04

Unit VIII Atoms and Nuclei - 06

Unit IX Electronic Devices - 07

Unit X Communication Systems - 05

TOTAL  - 70

Unit I: Electrostatics (Periods 25)

Electric Charges; Conservation of charge, Coulomb’s law-force between two point charges, forces between multiple charges; superposition principle and continuous charge distribution. Electric field, electric field due to a point charge, electric field lines; electric dipole, electric field due to a dipole; torque on a dipole in uniform electric field.

Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell (field inside and outside).

Electric potential, potential difference, electric potential due to a point charge, a dipole and system of charges; equipotential surfaces, electrical potential energy of a system of two point charges and of electric dipole in an electrostatic field.

Conductors and insulators, free charges and bound charges inside a conductor. Dielectrics and electric polarisation, capacitors and capacitance, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, energy stored in a capacitor. Van de Graaff generator.

Unit II: Current Electricity (Periods 22)

Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their relation with electric current; Ohm’s law, electrical resistance, V-I characteristics (linear and non-linear), electrical energy and power, electrical resistivity and conductivity.

Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors; temperature dependence of resistance.

Internal resistance of a cell, potential difference and emf of a cell, combination of cells in series and in parallel.

Kirchhoff’s laws and simple applications. Wheatstone bridge, metre bridge.

Potentiometer - principle and its applications to measure potential difference and for comparing emf of two cells; measurement of internal resistance of a cell.

Unit III: Magnetic Effects of Current and Magnetism (Periods 25)

Concept of magnetic field, Oersted’s experiment.

Biot - Savart law and its application to current carrying circular loop.

Ampere’s law and its applications to infinitely long straight wire, straight and toroidal solenoids.

Force on a moving charge in uniform magnetic and electric fields. Cyclotron. Force on a current-carrying conductor in a uniform magnetic field. Force between two parallel current-carrying conductors-definition of ampere. Torque experienced by a current loop in uniform magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter.

Current loop as a magnetic dipole and its magnetic dipole moment. Magnetic dipole moment of a revolving electron. Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis. Torque on a magnetic dipole (bar magnet) in a uniform magnetic field; bar magnet as an equivalent solenoid, magnetic field lines; Earth’s magnetic field and magnetic elements. Para-, dia- and ferro - magnetic substances, with examples. Electromagnets and factors affecting their strengths. Permanent magnets.

Unit IV: Electromagnetic Induction and Alternating Currents (Periods 20)

Electromagnetic induction; Faraday’s law, induced emf and current; Lenz’s Law, Eddy currents. Self and mutual inductance. Need for displacement current. Alternating currents, peak and rms value of alternating current/voltage; reactance and impedance; LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits, wattless current. AC generator and transformer.

Unit V: Electromagnetic waves (Periods 4)

Electromagnetic waves and their characteristics (qualitative ideas only). Transverse nature of electromagnetic waves.

Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, Xrays, gamma rays) including elementary facts about their uses.

Unit VI: Optics (Periods 30)

Reflection of light, spherical mirrors, mirror formula. Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lens-maker’s formula. Magnification, power of a lens, combination of thin lenses in contact. Refraction and dispersion of light through a prism.

Scattering of light - blue colour of the sky and reddish appearance of the sun at sunrise and sunset.

Optical instruments: Human eye, image formation and accommodation, correction of eye defects (myopia, hypermetropia, presbyopia and astigmatism) using lenses. Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers. Wave optics: wave front and Huygens’ principle, reflection and refraction of plane wave at a plane surface using wave fronts. Proof of laws of reflection and refraction using Huygens’ principle. Interference, Young’s double slit experiment and expression for fringe width, coherent sources and sustained interference of light. Diffraction due to a single slit, width of central maximum.

Resolving power of microscopes and astronomical telescopes. Polarisation, plane polarised light; Brewster’s law, uses of plane polarised light and Polaroids.

Unit VII: Dual Nature of Matter and Radiation (Periods

Dual nature of radiation. Photoelectric effect, Hertz and Lenard’s observations; Einstein’s photoelectric equation-particle nature of light.

Matter waves-wave nature of particles, de Broglie relation. Davisson-Germer experiment.

Unit VIII: Atoms & Nuclei (Periods 18)

Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen spectrum.

Composition and size of nucleus, atomic masses, isotopes, isobars; isotones. Radioactivityalpha, beta and gamma particles/rays and their properties; radioactive decay law.

Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number; nuclear fission and fusion.

Unit IX: Electronic Devices (Periods 18)

Semiconductors; semiconductor diode – I-V characteristics in forward and reverse bias, diode as a rectifier; I-V characteristics of LED, photodiode, solar cell, and Zener diode; Zener diode as a voltage regulator. Junction transistor, transistor action, characteristics of a transistor; transistor as an amplifier (common emitter configuration) and oscillator. Logic gates (OR, AND, NOT, NAND and NOR). Transistor as a switch.

Unit X: Communication Systems (Periods 10)

Elements of a communication system (block diagram only); bandwidth of signals (speech, TV and digital data); bandwidth of transmission medium. Propagation of electromagnetic waves in the atmosphere, sky and space wave propagation. Need for modulation. Production and detection of an amplitude-modulated wave.

Read more here: http://entrance-exam.net/cbse-2009-class-xll-physics-sample-papers/#ixzz1BfiXzUQl@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@(39) BLUE PRINT -IIIXII - PHYSICSTopic VSA SA I SA II LA Total

( 1 mark) ( 2 marks) ( 3 marks) ( 5 marks)Electrostatics 1(1) 2(1) - 5(1) 8(3)Current Electricity - 4(2) 3(1) - 7(3)Magnetic effect & Magnetism 1(1) 2(1) - 5(1) 8(3)Electromagnetic induction & 1(1) 4(2) 3(1) - 8(4)Alternating currentsElectromagnetic Waves 1(1) 2(1) - - 3(2)Optics 1(1) 2(1) 6(2) 5(1) 14(5)Dual Nature of Matter 1(1) - 3(1) - 4(2)Atoms & Nuclei - - 6 (2) - 6(2)Electronic Devices 2(2) 2(1) 3(1) - 7(4)Communication Systems - 2(1) 3(1) - 5(2)Total 8(8) 20(10) 27(9) 15(3) 70(30)(40)SAMPLE PAPER IIIXII - PHYSICSTime : Three Hours Max. Marks : 70General Instructions :(a) All questions are compulsory.(b) There are 30 questions in total. Questions 1 to 8 carry one mark each, questions 9 to 18 carry two marks each,questions 19 to 27 carry three marks each and questions 28 to 30 carry five marks each.(c) There is no over all choice. However, an internal choice has been provided in one question of two marks, onequestion of three marks and all three questions of five marks each. You have to attempt only one of the givenchoices in such questions.(d) Use of calculators is not permitted.(e) You may use the following physical constants wherever necessary :c = 3 x 108ms-1

h = 6.6 x 10-34Jse = 1.6 x 10-19 C=Boltzmann constant k = 1.38 x 1023 JK-1

Avogadro’s number NA = 6.023 x 1023/moleMass of neutron mn = 1.6 x 10-27 kgMass of electron me = 9 x 10 31 kg1. The graph shown here, shows the variation of the total energy (E) stored in a capacitor against the value of thecapacitance(C) itself. Which of the two - the charge on the capacitor or the potential used to charge it is keptconstant for this graph?12. An - particle and a proton are moving in the plane of the paper in a region where there is a unifom magentic field

( ) directed normal to the plane of the paper. If the two particles have equal linear momenta, what will be the ratioof the radii of their trajectories in the field? 13. State the condition under which a microwave oven heats up a food item containing water molecules mostefficiently. 1(41)4. An electrical element X, when connected to an alternating voltage source, has the current through it leading thevoltage by radii. Identify X and write an expression for its reactance. 15. A double convex lens, made from a material of refractive index , is immersed is a liquid of refractive indexwhere . What change, if any, would occur in the nature of the lens? 16. The de Broglie wavelengths, associated with a proton and a neutron, are found to be equal. Which of the two hasa higher value for kinetic energy? 17. Carbon and silicon are known to have similar lattice structures. However, the four bonding electrons of carbon arepresent in second orbit while those of silicon are present in its third orbit. How does this difference result in adifference in their electrical conductivities? 18. An unknown input (A) and the input (B) shown here, are used as the two inputs in a NAND gate. The output Y, hasthe form shown below. Identify the intervals over which the input ‘A’ must be ‘low’.19. The two graphs drawn below, show the variation of electrostatic potential (V) with (r being distance of the fieldpoint from the point charge) for two point charges q1 and q2.(42)(i) What are the signs of the two charges?(ii) Which of the two charges has a larger magnitude and why? 210. Calculate the temperature at which the resistance of a conductor becomes 20% more than its resistance at 270C.The value of the temperature coefficient of resistance of the conductor is . 211. A student records the following data for the magnitudes (B) of the magnetic field at axial points at differentdistances x from the centre of a circular coil of radius a carrying a current I. Verify (for any two) that theseobservations are in good agreement with the expected theoratical variation of B with x.x = 0 x = a x = 2a x = 3a212. An armature coil consists of 20 turns of wire, each of area A = 0.09m2 and total resistance 15.0 . It rotates in amegnetic field of 0.5T at a constant frequency of . Calculate the value of (i) maximum (ii) averageinduced emf produced in the coil 2

13. Two cells of emf E1 and E2 have internal resistance r1 and r2. Deduce an expression for equivalent emf of theirparallel combination.ORA cell of emf (E) and internal resistance (r) is connected across a variable external resistance (R).Plot graphs to show variation of(43)(i) E with R ,(ii) Terminal p.d. of the cell (V) with R 214. Fig. shows a light bulb (B) and iron cored inductor connected to a DC battery through a switch (S). 2(i) What will one observe when switch (S) is closed?(ii) How will the glow of the bulb change when the battery is replaced by an ac source of rms voltage equal to thevoltage of DC battery? Justify your answer in each case.15. Electromagnetic radiations with wavelength 2(i) are used to kill germs in water purifiers.(ii) are used in TV communication systems(iii) play an important role in maintaining the earth’s warmth.Name the part of electromagnetic spectrum to which these radiations belong. Arrange these wavelengths indecreasing order of their magnitude.16. What do the terms ‘depletion region’ and ‘barrier potential’ mean for a p-n junction? 217. We do not choose to transmit an audio signal by just directly converting it to an e.m. wave of the same frequency.Give two reasons for the same. 218. Light of wavelength 550 nm. is incident as parallel beam on a slit of width 0.1mm. Find the angular width and the linearwidth of the principal maxima in the resulting diffraction pattern on a screen kept at a distance of 1.1m from the slit. Whichof these widths would not change if the screen were moved to a distance of 2.2m from the slit? 219. The given figure shows the experimental set up of a metre bridge. The null point is found to be 60cm away from theend A with X and Y in position as shown.(44)When a resistance of 15 is connected in series with ‘Y’, the null point is found to shift by 10cm towards the endA of the wire. Find the position of null point if a resistance of 3 O were connected in parallel with ‘Y’. 3ORWhy is a potentiometer preferred over a voltmeter for determining the emf of a cell?Two cells of Emf E1 and E2 are connected together in two ways shown here.The ‘balance points’ in a given potentiometer experiment for these two combinations of cells are found to be at351.0cm and 70.2cm respectively. Calculate the ratio of the Emfs of the two cells.

20. When a circuit element ‘X’ is connected across an a.c. source, a current of A flows through it and this currentis in phase with the applied voltage. When another element ‘Y’ is connected across the same a.c. source, the samecurrent flows in the cricuit but it leads the voltage by radians.(i) Name the circuit elements X and Y.(ii) Find the current that flows in the circuit when the series combination of X and Y is connected across the samea.c. voltage.(iii) Plot a graph showing variation of the net impedance of this series combination of X and Y as a function of theangular frequency of the applied voltage. 321. Give reasons for the following : 3(a) Astronomers prefer to use telescopes with large objective diameters to observe astronomical objects.(b) Two identical but independent monochromatic sources of light cannot be coherent.(c) The value of the Brewster angle for a transparent medium is different for lights of different colours.22. The given graphs show the variation of the stopping potential Vs with the frequency ( ) of the incident radiationsfor two different photosensitive materials M1 and M2.(45)(i) What are the values of work functions for M1 and M2 ?(ii) The values of the stopping potential for M1 and M2 for a frequency of the incident radiations areV1 and V2

respectively. Show that the slope of the lines equals 323. What is a wavefront? Distinguish between a plane wavefront and a spherical wavefront. Explain with the help of adiagram, the refraction of a plane wavefront at a plane surface using Huygen’s construction. 324. Define the term ‘Activity’ of a radioactive substance. State its SI unit.Two different radioactive elements with half lives T1 and T2 have N1 and N2 (undecayed) atoms respectivelypresent at a given instant. Determine the ratio of their activities at this instant. 325. (a) Draw the block diagram of a communication system.(b) What is meant by ‘detection’ of a modulated carrier wave? Describe briefly the essential steps for detection.326. The given circuit diagram shows a transistor configuration along with its output characteristics. Identify(i) the type of transistor used and(ii) the transistor configuration employed.(46)Use these graphs to obtain the approximate value of current amplication factor for the transistor at. 3

27. State Bohr’s postulate for the ‘permitted orbits’ for the electron in a hydrogen atom.Use this postulate to prove that the circumference of the nth permitted orbit for the electron can ‘contain’ exactlyn wave lengths of the deBroglie wavelength associated with the electron in that orbit. 328. Obtain an expression for the capacitance of a parallel plate (air)capacitor.The given figure shows a network of five capacitors connected to a 100V supply. Calculate the total charge andenergy stored in the network.ORUse Gauss’s law to obtain an expression for the electric field due to an infinitely long straight uniformly chargedwire.Electric field in the above figure is directed along + X direction and given by Ex = 5Ax + 2B, where E is in NC-1 andx is in metre, A and B are constants with dimensions Talking and B = 5NC-1 calculate.(i) the electric flux through the cube.(ii) net charge enclosed within the cube. 5(47)29. (a) Draw the labelled diagram of moving coil galvanometer. Prove that in a radial magnetic field, the deflection ofthe coil is directly proportional to the current flowing in the coil.(b) A galvanometer can be converted into a voltmeter to measure up to(i) ‘V’ volts by connecting a resistance R1 in series with coil.(ii) volts by connecting a resistance R2 in series with its coilFind the resistance (R), in terms of R1 and R2 required to convert it into a voltmeter that can read up to ‘2V’ volts.OR(a) Draw diagrams to depict the behaviour of magnetic field lines near a ‘ bar’ of:(i) copper(ii) Aluminium(iii) Mercury, cooled to a very low temperature (4.2K)(b) The vertical component of the earth’s agnetic field at a given place in times its horizontal component. Iftotal intensity of earth’s magnetic field at the place is 0.4 G find the value of :(i) angle of dip(ii) the horizontal component of earth’s magnetic field.30. (a) Draw a ray diagram to show the refraction of light through a glass prism. Hence obtain the relation for the angleof deviation in terms of the angle of incidence, angle of emergence and the angle of the prism.(b) A right angled isosceles glass prism is made from glass of refractive index 1.5. Show that a ray of light incidentnormally on(i) one of the equal sides of this prism is deviated through 900

(ii) the hypotenuse of this prism is deviated through 1800

OR

(a) With the help of a labelled ray diagram, show the image formation by a compound microscope. Derive anexpression for its magnifying power.(b) How does the resolving power of a compound microscope get affected on(i) decreasing the diameter of its objective?(ii) increasing the focal length of its objective?@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ (39) BLUE PRINT -IIIXII - PHYSICSTopic VSA SA I SA II LA Total( 1 mark) ( 2 marks) ( 3 marks) ( 5 marks)Electrostatics 1(1) 2(1) - 5(1) 8(3)Current Electricity - 4(2) 3(1) - 7(3)Magnetic effect & Magnetism 1(1) 2(1) - 5(1) 8(3)Electromagnetic induction & 1(1) 4(2) 3(1) - 8(4)Alternating currentsElectromagnetic Waves 1(1) 2(1) - - 3(2)Optics 1(1) 2(1) 6(2) 5(1) 14(5)Dual Nature of Matter 1(1) - 3(1) - 4(2)Atoms & Nuclei - - 6 (2) - 6(2)Electronic Devices 2(2) 2(1) 3(1) - 7(4)Communication Systems - 2(1) 3(1) - 5(2)Total 8(8) 20(10) 27(9) 15(3) 70(30)(40)SAMPLE PAPER IIIXII - PHYSICSTime : Three Hours Max. Marks : 70General Instructions :(a) All questions are compulsory.(b) There are 30 questions in total. Questions 1 to 8 carry one mark each, questions 9 to 18 carry two marks each,questions 19 to 27 carry three marks each and questions 28 to 30 carry five marks each.(c) There is no over all choice. However, an internal choice has been provided in one question of two marks, onequestion of three marks and all three questions of five marks each. You have to attempt only one of the givenchoices in such questions.(d) Use of calculators is not permitted.(e) You may use the following physical constants wherever necessary :c = 3 x 108ms-1

h = 6.6 x 10-34Jse = 1.6 x 10-19 C=Boltzmann constant k = 1.38 x 1023 JK-1

Avogadro’s number NA = 6.023 x 1023/mole

Mass of neutron mn = 1.6 x 10-27 kgMass of electron me = 9 x 10 31 kg1. The graph shown here, shows the variation of the total energy (E) stored in a capacitor against the value of thecapacitance(C) itself. Which of the two - the charge on the capacitor or the potential used to charge it is keptconstant for this graph?12. An - particle and a proton are moving in the plane of the paper in a region where there is a unifom magentic field( ) directed normal to the plane of the paper. If the two particles have equal linear momenta, what will be the ratioof the radii of their trajectories in the field? 13. State the condition under which a microwave oven heats up a food item containing water molecules mostefficiently. 1(41)4. An electrical element X, when connected to an alternating voltage source, has the current through it leading thevoltage by radii. Identify X and write an expression for its reactance. 15. A double convex lens, made from a material of refractive index , is immersed is a liquid of refractive indexwhere . What change, if any, would occur in the nature of the lens? 16. The de Broglie wavelengths, associated with a proton and a neutron, are found to be equal. Which of the two hasa higher value for kinetic energy? 17. Carbon and silicon are known to have similar lattice structures. However, the four bonding electrons of carbon arepresent in second orbit while those of silicon are present in its third orbit. How does this difference result in adifference in their electrical conductivities? 18. An unknown input (A) and the input (B) shown here, are used as the two inputs in a NAND gate. The output Y, hasthe form shown below. Identify the intervals over which the input ‘A’ must be ‘low’.19. The two graphs drawn below, show the variation of electrostatic potential (V) with (r being distance of the fieldpoint from the point charge) for two point charges q1 and q2.(42)(i) What are the signs of the two charges?(ii) Which of the two charges has a larger magnitude and why? 210. Calculate the temperature at which the resistance of a conductor becomes 20% more than its resistance at 270C.The value of the temperature coefficient of resistance of the conductor is . 211. A student records the following data for the magnitudes (B) of the magnetic field at axial points at different

distances x from the centre of a circular coil of radius a carrying a current I. Verify (for any two) that theseobservations are in good agreement with the expected theoratical variation of B with x.x = 0 x = a x = 2a x = 3a212. An armature coil consists of 20 turns of wire, each of area A = 0.09m2 and total resistance 15.0 . It rotates in amegnetic field of 0.5T at a constant frequency of . Calculate the value of (i) maximum (ii) averageinduced emf produced in the coil 213. Two cells of emf E1 and E2 have internal resistance r1 and r2. Deduce an expression for equivalent emf of theirparallel combination.ORA cell of emf (E) and internal resistance (r) is connected across a variable external resistance (R).Plot graphs to show variation of(43)(i) E with R ,(ii) Terminal p.d. of the cell (V) with R 214. Fig. shows a light bulb (B) and iron cored inductor connected to a DC battery through a switch (S). 2(i) What will one observe when switch (S) is closed?(ii) How will the glow of the bulb change when the battery is replaced by an ac source of rms voltage equal to thevoltage of DC battery? Justify your answer in each case.15. Electromagnetic radiations with wavelength 2(i) are used to kill germs in water purifiers.(ii) are used in TV communication systems(iii) play an important role in maintaining the earth’s warmth.Name the part of electromagnetic spectrum to which these radiations belong. Arrange these wavelengths indecreasing order of their magnitude.16. What do the terms ‘depletion region’ and ‘barrier potential’ mean for a p-n junction? 217. We do not choose to transmit an audio signal by just directly converting it to an e.m. wave of the same frequency.Give two reasons for the same. 218. Light of wavelength 550 nm. is incident as parallel beam on a slit of width 0.1mm. Find the angular width and the linearwidth of the principal maxima in the resulting diffraction pattern on a screen kept at a distance of 1.1m from the slit. Whichof these widths would not change if the screen were moved to a distance of 2.2m from the slit? 219. The given figure shows the experimental set up of a metre bridge. The null point is found to be 60cm away from theend A with X and Y in position as shown.(44)

When a resistance of 15 is connected in series with ‘Y’, the null point is found to shift by 10cm towards the endA of the wire. Find the position of null point if a resistance of 3 O were connected in parallel with ‘Y’. 3ORWhy is a potentiometer preferred over a voltmeter for determining the emf of a cell?Two cells of Emf E1 and E2 are connected together in two ways shown here.The ‘balance points’ in a given potentiometer experiment for these two combinations of cells are found to be at351.0cm and 70.2cm respectively. Calculate the ratio of the Emfs of the two cells.20. When a circuit element ‘X’ is connected across an a.c. source, a current of A flows through it and this currentis in phase with the applied voltage. When another element ‘Y’ is connected across the same a.c. source, the samecurrent flows in the cricuit but it leads the voltage by radians.(i) Name the circuit elements X and Y.(ii) Find the current that flows in the circuit when the series combination of X and Y is connected across the samea.c. voltage.(iii) Plot a graph showing variation of the net impedance of this series combination of X and Y as a function of theangular frequency of the applied voltage. 321. Give reasons for the following : 3(a) Astronomers prefer to use telescopes with large objective diameters to observe astronomical objects.(b) Two identical but independent monochromatic sources of light cannot be coherent.(c) The value of the Brewster angle for a transparent medium is different for lights of different colours.22. The given graphs show the variation of the stopping potential Vs with the frequency ( ) of the incident radiationsfor two different photosensitive materials M1 and M2.(45)(i) What are the values of work functions for M1 and M2 ?(ii) The values of the stopping potential for M1 and M2 for a frequency of the incident radiations areV1 and V2

respectively. Show that the slope of the lines equals 323. What is a wavefront? Distinguish between a plane wavefront and a spherical wavefront. Explain with the help of adiagram, the refraction of a plane wavefront at a plane surface using Huygen’s construction. 324. Define the term ‘Activity’ of a radioactive substance. State its SI unit.Two different radioactive elements with half lives T1 and T2 have N1 and N2 (undecayed) atoms respectivelypresent at a given instant. Determine the ratio of their activities at this instant. 325. (a) Draw the block diagram of a communication system.

(b) What is meant by ‘detection’ of a modulated carrier wave? Describe briefly the essential steps for detection.326. The given circuit diagram shows a transistor configuration along with its output characteristics. Identify(i) the type of transistor used and(ii) the transistor configuration employed.(46)Use these graphs to obtain the approximate value of current amplication factor for the transistor at. 327. State Bohr’s postulate for the ‘permitted orbits’ for the electron in a hydrogen atom.Use this postulate to prove that the circumference of the nth permitted orbit for the electron can ‘contain’ exactlyn wave lengths of the deBroglie wavelength associated with the electron in that orbit. 328. Obtain an expression for the capacitance of a parallel plate (air)capacitor.The given figure shows a network of five capacitors connected to a 100V supply. Calculate the total charge andenergy stored in the network.ORUse Gauss’s law to obtain an expression for the electric field due to an infinitely long straight uniformly chargedwire.Electric field in the above figure is directed along + X direction and given by Ex = 5Ax + 2B, where E is in NC-1 andx is in metre, A and B are constants with dimensions Talking and B = 5NC-1 calculate.(i) the electric flux through the cube.(ii) net charge enclosed within the cube. 5(47)29. (a) Draw the labelled diagram of moving coil galvanometer. Prove that in a radial magnetic field, the deflection ofthe coil is directly proportional to the current flowing in the coil.(b) A galvanometer can be converted into a voltmeter to measure up to(i) ‘V’ volts by connecting a resistance R1 in series with coil.(ii) volts by connecting a resistance R2 in series with its coilFind the resistance (R), in terms of R1 and R2 required to convert it into a voltmeter that can read up to ‘2V’ volts.OR(a) Draw diagrams to depict the behaviour of magnetic field lines near a ‘ bar’ of:(i) copper(ii) Aluminium(iii) Mercury, cooled to a very low temperature (4.2K)(b) The vertical component of the earth’s agnetic field at a given place in times its horizontal component. Iftotal intensity of earth’s magnetic field at the place is 0.4 G find the value of :(i) angle of dip

(ii) the horizontal component of earth’s magnetic field.30. (a) Draw a ray diagram to show the refraction of light through a glass prism. Hence obtain the relation for the angleof deviation in terms of the angle of incidence, angle of emergence and the angle of the prism.(b) A right angled isosceles glass prism is made from glass of refractive index 1.5. Show that a ray of light incidentnormally on(i) one of the equal sides of this prism is deviated through 900

(ii) the hypotenuse of this prism is deviated through 1800

OR(a) With the help of a labelled ray diagram, show the image formation by a compound microscope. Derive anexpression for its magnifying power.(b) How does the resolving power of a compound microscope get affected on(i) decreasing the diameter of its objective?(ii) increasing the focal length of its objective?

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SAMPLE QUESTION PAPER 2010PHYSICAL EDUCATION

CLASS-XII

Time 03 hrs Max Marks 70

General Instructions:-

1. All questions are compulsory.2. Question paper carries A & B two parts.3. Answers to questions carrying 2 marks should approximately 50-100 words.4. Answers to questions carrying 4 marks should approximately 100-150 words.5. Answers to questions carrying 5 marks should approximately 150-200 words.6. Answers to questions carrying 6 marks should approximately 200-250 words.7. Answers to questions carrying 10 marks should approximately 300-400 words.

Part – A

1. What do you mean by physical fitness? Explain wellness. Also explain the components of physical fitness in detail. 2+2+6=10OR

What do you understand by Aerobics Exercises? Explain Anaerobic exercises. Describe in detail the factors effecting physical fitness and wellness. 2+2+6=10

2. Explain concept of training. Write briefly the methods of endurance development.4+6=10ORWhat do you understand by “Warming-Up”? Briefly explain about “limber-down”. Draw a diagram of Circuit Training & Explain its benefits. 2+2+6=10

3. Specify role of sociology in sports. What do you understand by leadership? Explain in brief the qualities of a leader in Games & Sports. 2+2+6=10ORWhat is Olympic Mott? What do you understand by Modern Olympics? Justify “Games & Sports as Man’s Cultural Heritage”. 2+2+6=10

4. Describe the following: 2×5=10a. Sports environment.b. Essential elements of sports environment.c. Role of individual in improving sports environment.d. Prevention of sports related accidents.e. Physical education as a medium to improve sports environment.ORWhat do you mean by positive sports environment? How it helps in performing better?5+5=10

5. Explain the term YOGA. What is its importance? Also explain its various elements.2+2+6=10OR“Yoga as an Indian heritage.” Discuss. 10

Part – B

1. Write the following about game/sport of your choice: 2+2+6=10a. List four terminologies of the game/sport.b. Discuss any two fundamental skills.c. Draw a labeled diagram of the court/field/table of the game/sport.ORWrite in brief the history of game/sports of your choice. Describe any four general rules. Also draw a labeled diagram of the court/field/table of the game/sport. 2+2+6=10

2. Write about two important tournaments of sport/game of your choice. Name any two sports personalities explain injuries and the first aid measures related to it. 2+2+6=10 ORWhat is the importance of sports organizations? What are the functions of I.O.A. Give an introduction of Arjuna Award, Dronacharya Award & Rajiv Gandhi Khel Ratna Award.2+2+6=10

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@CBSE Syllabus Class 12 for 2010: Chemistry

Chemistry: CBSE syllabus class 12 for March 2010 examinations.

COURSE STRUCTUREClass XII CHEMISTRY (Theory)One Paper Time: 3 Hours 70 marks

Unit - Marks

Unit I Solid State - 04

Unit II Solutions - 05

Unit III Electrochemistry - 05

Unit IV Chemical kinetics - 05

Unit V Surface chemistry - 04

Unit VI General principles and processes of Isolation of Elements - 03

Unit VII p-Block Elements - 08

Unit VIII d- and f- Block Elements - 05

Unit IX Coordination Compounds - 03

Unit X Haloalkanes and Haloarenes - 04

Unit XI Alcohols, Phenols and Ethers - 04

Unit XII Aldehydes, Ketones and Carboxylic acids - 06

Unit XIII Organic Compounds containing Nitrogen - 04

Unit XIV Biomolecules - 04

Unit XV Polymers - 03

Unit XVI Chemistry in Everyday life - 03

TOTAL - 70

Unit I: Solid State (Periods 12)

Classification of solids based on different binding forces: molecular, ionic, covalent and metallic solids, amorphous and crystalline solids (elementary idea), unit cell in two dimensional and three dimensional lattices, calculation of density of unit cell, packing in solids, voids, number of atoms per unit cell in a cubic unit cell, point defects, electrical and magnetic properties.

Unit II: Solutions (Periods 12)

Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, colligative properties – relative lowering of vapour pressure, elevation of Boiling Point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass.

Unit III: Electrochemistry (Periods 14)

Redox reactions, conductance in electrolytic solutions, specific and molar conductivity variations of conductivity with concentration, Kohlrausch’s Law, electrolysis and laws of electrolysis (elementary idea), dry cell – electrolytic cells and Galvanic cells; lead accumulator, EMF of a cell, standard electrode potential, Nernst equation and its application to chemical cells, fuel cells; corrosion.

Unit IV: Chemical Kinetics (Periods 12)

Rate of a reaction (average and instantaneous), factors affecting rates of reaction; concentration, temperature, catalyst; order and molecularity of a reaction; rate law and specific rate constant, integrated rate equations and half life (only for zero and first order reactions); concept of collision theory (elementary idea, no mathematical treatment)

Unit V: Surface Chemistry (Periods

Adsorption – physisorption and chemisorption; factors affecting adsorption of gases on solids; catalysis : homogenous and heterogeneous, activity and selectivity: enzyme catalysis; colloidal state: distinction between true solutions, colloids and suspensions; lyophilic, lyophobic, multimolecular and macromolecular colloids; properties of colloids; Tyndall effect, Brownian movement, electrophoresis, coagulation; emulsion – types of emulsions.

Unit VI: General Principles and Processes of Isolation of Elements (Periods

Principles and methods of extraction - concentration, oxidation, reduction electrolytic method and refining; occurrence and principles of extraction of aluminium, copper, zinc and Iron.

Unit VII: p-Block Elements (Periods 14)

Group 15 elements: General introduction, electronic configuration, occurrence, oxidation states, trends in physical and chemical properties; nitrogen - preparation, properties and uses;

compounds of nitrogen: preparation and properties of ammonia and nitric acid, oxides of nitrogen (structure only); Phosphorous-allotropic forms; compounds .of phosphorous: preparation and properties of phosphine, halides (PCl3, PCl5) and oxoacids (elementary idea only)Group 16 elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; dioxygen: preparation, properties and uses; simple oxides; Ozone. Sulphur - allotropic forms; compounds of sulphur: preparation, properties and uses of sulphur dioxide; sulphuric acid: industrial process of manufacture, properties and uses, oxoacids of sulphur (structures only).Group 17 elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; compounds of halogens: preparation, properties and uses of chlorine and hydrochloric acid, interhalogen compounds, oxoacids of halogens (structures only).Group 18 elements: General introduction, electronic configuration. Occurrence, trends in physical and chemical properties, uses.

Unit VIII: d and f Block Elements (Period 14)

General introduction ,electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first row transition metals – metallic character, ionization enthalpy, oxidation states, ionic radii, colour catalytic property, magnetic properties, interstitial compounds, alloy formation. Preparation and properties of K2Cr2O7 and KMnO4.Lanthanoids - electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction.Actinoids - Electronic configuration, oxidation states.

Unit IX: Coordination Compounds (Period 12)

Coordination compounds - Introduction, ligands, coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds.bonding; isomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological systems).

Unit X: Haloalkanes and Haloarenes. (Periods 12)

Haloalkanes: Nomenclature, nature of C-X bond, physical and chemical properties, mechanism of substitution reactions.Haloarenes: Nature of C-X bond, substitution reactions (directive influence of halogen for monosubstituted compounds only)Uses and environmental effects of - dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

Unit XI: Alcohols, Phenols and Ethers (Periods 12)

Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary alcohols only); identification of primary, secondary and tertiary alcohols; mechanism of

dehydration, uses of methanol and ethanol.Phenols : Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophillic substitution reactions, uses of phenols.Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

Unit XII: Aldehydes, Ketones and Carboxylic Acids (Periods 12)

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties mechanism of nucleophilic addition, reactivity of alpha hydrogen in aldehydes; uses.Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

Unit XIII: Organic compounds containing Nitrogen (Periods 10)

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines.Cyanides and Isocyanides - will be mentioned at relevant places in context.Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Unit XIV: Biomolecules (Periods 12)

Carbohydrates - Classification (aldoses and ketoses), monosaccahrides (glucose and fructose), oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen); importance.Proteins - Elementary idea of α - amino acids, peptide bond, polypeptides proteins, primary structure, secondary structure, tertiary structure and quaternary structure (qualitative idea only), denaturation of proteins; enzymes.Vitamins -Classification and functions.Nucleic Acids: DNA & RNA .

Unit XV: Polymers (Periods

Classification - natural and synthetic, methods of polymerization (addition and condensation), copolymerization. Some important polymers: natural and synthetic like polythene, nylon, polyesters, bakelite, rubber.

Unit XVI: Chemistry in Everyday life: (Period

1. Chemicals in medicines - analgesics, tranquilizers, antiseptics, disinfectants, antimicrobials, antifertility drugs, antibiotics, antacids, antihistamines.2. Chemicals in food - preservatives, artificial sweetening agents.3. Cleansing agents - soaps and detergents, cleansing action.

Read more here: http://entrance-exam.net/cbse-2009-class-xllth-chemistry-sample-papers/#ixzz1Bfl8bETX@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Sample Paper – 2008

Class – XII

Subject - Chemistry

Time: Three Hours Max.Marks: 70

1. All questions are compulsory.

2. Question nos. 1 to 8 are very short answer questions and carry 1 mark each.

3. Question nos. 9 to 18 are short answer questions and carry 2 marks each.

4. Question nos. 19 to 27 are also short answer questions and carry 3 marks each

5. Question nos. 28 to 30 are long answer questions and carry 5 marks each

6. Use log tables if necessary, use of calculators is not allowed.

1. What type of drug pencillin is?1

2. Give one example of biodegradable polymer?1

3. What is meant by anomers?1

4. Write zwitter ion of amino acetic acid.1

5. Give the IUPAC name of the following compounds:

6. Why propanol has higher boiling point than that of the hydrocarbon, butane?1

7. Give the chemical formula for the compound potassium hexacyanocobaltate (III)1

8. State Hardy-Schulze rule.1

9. Give three differences between amorphous and crystalline compounds?2

10. An element has a body centred cubic (bcc) structure with s cell edge of 288pm. The density of

of the element of 7.2g/cm3. How many atoms are present in 208g of the element?2

11. State Raoult’slaw for a solution of volatile liquids.2

12. Calculate the equilibrium constant for the reaction:

Zn(s) + Cu+2(aq) Zn+2(aq) + Cu(s), Given: EoZn

+2/Zn = -0.763V and Eo Cu+2/Cu = +0.34V. 2

13. What is lanthanoids contraction? What are the consequences of lanthanoids contraction?2

14. Using valance bond theory, predict the geometry and magnetic behaviour of [NiCl4]-2.2

15. What are amident nucleophiles? Explain with suitable example.2

16. Explain why tert-butyl chloride reacts with aqueous sodium hydroxide by SN1 mechanism

while n-butyl chloride reacts by SN2 mechanism?

2

17. Distinguish between ‘chain growth polymerisation’ and ‘step growth polymerisation’ and give one example of each type.

2

18. Define the following and give one example of each:

i) Antihistamines ii) Antacids2

19. a) Define vitamins and state their classification. List two vitamins of each class.

b) What are enzymes? State the activity of an enzyme.2

20. Give reason:

i) It is difficult to prepare pure amines by ammonolysis of alkyl halide.

ii) Aniline is a weaker base than cyclohexylamine.

iii) Amines have lower boiling points than those of the corresponding alcohols.3

21. Explain the following with suitable example:

i) Kolbe’s reaction

ii) Reimer-Tiemann reaction

iii) Williamson ether synthesis.3

22. Indicate the steps in the preparation of K2Cr2O7 from chromite ore.3

23. Complete the following reactions:

i) I2 + NaClO3 ii) I2+ S2O3-2

iii) XeF2 + H2O 3

24. Write short notes on the following giving example:

i) Magnetic separation]

ii)Aluminothermic process.

iii) Liquation3

25. State what is observed when:

i) the electrodes connected to a battery are dipped into a sol.

ii) an electrolyte solution is added to a sol.

iii) an emulsion is subjected to high speed centrifugation.3

26. a) What is corrosion? What are the factors which affect corrosion? CO2 always present in

natural water. Explain its effect (increases, stops or no effect) on rusting of Fe.

b) Give the cell reaction in H2-O2 fuel cell.3

27. Determine the amount of CaCl2 ( i= 2.47) dissolved in 2.5 litre of water such that its osmotic

pressure is 0.75 atm at 27oC.3

28. a) Time required for 10% completion of a first order reaction at 298K is equal to that required

for its 25% completion at 308K. If the value of A is 4 x 1010s-1.calculate k at 318K and Ea.

b) Account about pseudo first order reaction with suitable example.

c) Show that in a first order reaction, time required for completion of 99.99% is 10 times

of half-life (t1/2) of the reaction.5

29. i) Xe has highest polarising power. Why?

ii) Halogens are coloured. Why?

iii) Noble gases are mostly chemically inert. Why?

iv) Nitrogen does not form pentahalide. Why?

v) Bismuth is a strong oxidising agent in pentavalent state. Why?5

30. a) An organic compound ‘A’ C8H6 on treatment with dilute H2SO4 containing mercuric sulphate

gives compound ‘B’. Which can also be obtained from a reaction of benzene with acid chloride

in the presence of AlCl3? ‘B’ on treatment with I2 in aq.KOH gives ‘C’ and yellow compound ‘D’. Identify A,B,C and D. Give the chemical reactions involved.

b) How will you convert:

i) acetophenone to ethyl benzene ii) propanone to 2-Propanopl.

State conditions and reactions in each case. 5

-----------------------------all the best-----------------------

Posted by:

Mr.VINTU.P.VARGHESE MSc UGC NET

Sel.Gr. Lecturer

Department of Chemistry

TANDEM KUWAIT

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PHYSICAL EDUCATION

CLASS-XII

Time 03 hrs Max Marks 70

General Instructions:-

1. All questions are compulsory.2. Question paper carries A & B two parts.

3. Answers to questions carrying 2 marks should approximately 50-100 words.4. Answers to questions carrying 4 marks should approximately 100-150 words.5. Answers to questions carrying 5 marks should approximately 150-200 words.6. Answers to questions carrying 6 marks should approximately 200-250 words.7. Answers to questions carrying 10 marks should approximately 300-400 words.

Part – A

1. What do you mean by physical fitness? Explain wellness. Also explain the components of physical fitness in detail.

2+2+6=10OR

What do you understand by Aerobics Exercises? Explain Anaerobic exercises. Describe in detail the factors effecting physical fitness and wellness.

2+2+6=10

2. Explain concept of training. Write briefly the methods of endurance development.

4+6=10

OR

What do you understand by “Warming-Up”? Briefly explain about “limber-down”. Draw a diagram of Circuit Training & Explain its benefits.

2+2+6=10

3. Specify role of sociology in sports. What do you understand by leadership? Explain in brief the qualities of a leader in Games & Sports.

2+2+6=10OR

What is Olympic Mott? What do you understand by Modern Olympics? Justify “Games & Sports as Man’s Cultural Heritage”.

2+2+6=10

4. Describe the following:2x5=10

a. Sports environment.b. Essential elements of sports environment.c. Role of individual in improving sports environment.d. Prevention of sports related accidents.e. Physical education as a medium to improve sports environment.

OR

What do you mean by positive sports environment? How it helps in performing better?

5+5=10

2. Explain the term YOGA. What is its importance? Also explain its various elements.

2+2+6=10

OR

“Yoga as an Indian heritage.” Discuss. 10

Part – B

1. Write the following about game/sport of your choice: 2+2+6=10

a. List four terminologies of the game/sport.b. Discuss any two fundamental skills.c. Draw a labeled diagram of the court/field/table of the game/sport.

OR

Write in brief the history of game/sports of your choice. Describe any four general rules. Also draw a labeled diagram of the court/field/table of the game/sport. 2+2+6=10

2. Write about two important tournaments of sport/game of your choice. Name any two sports personalities explain injuries and the first aid measures related to it. 2+2+6=10

OR

What is the importance of sports organizations? What are the functions of I.O.A. Give an introduction of Arjuna Award, Dronacharya Award & Rajiv Gandhi Khel Ratna Award.

2+2+6=10

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