Holiday Home Work 2017-2018

Class –X Subject –Chemistry

Note : Solve twenty sample papers of Previous years

Q.1 What is the importance of Neutralization reaction in our daily life? Explain with suitable examples.

Q.2 What is the Ant acid available in the market? And compare the Ant acid available in the kitchen.

Q.3 Write about the brief history of important Scientist of Chemistry .

Q.4 What do you mean by the Soap and Detergent? Explain the cleansing action of Soap and detergent .

Q.5 Write I.U.P.A.C name of the following compound .

CH3 (CH2)2 CHO , CH3 (CH2)3 CH2 COOH and CH3(CH2)CH2OH

Q.6 Explain the Combination reaction and Displacement reaction.

Q.7 What are amphoteric oxides? Give two examples of amphotric oxide .

Q.8 Prepare Plaster of Paris from Gypsum. Also write the chemical properties of POP.

Q.9 How would you convert (i) ethane to ethane (ii) Acetelene to ethanoic acid

Q.10 What is meant by Substitution reaction? Give an example (with equations ) of the substitution reaction of an alkane .

Q.11 Give one example of Esterification and Saponification reaction .

Q.12 What do you mean by Mendeleev Modern and Old Periodic?

Q.13 Write the Characteristic of S and p block elements.

Q.14 Write the short notes on Metallic Character and Atomic radii.

Q.15 What do you mean by basic strength of an elements. Explain the periodic variation across the period and in a group.

Holiday Home Work 2017-2018

Class –IX Subject –Chemistry

Q.1 What is the source of water supply in your city? Explain the Water purification system OR Water Treatment Plant of your city

Q.2 What is the Ground level of your city? What are the factors affecting the Ground level of water in your city?

Q3:-State the law of conservation of mass. Give one example to illustrate this law.

Q4:-An element ‘E’ has a valency of 4.

(1) What will be the formula of its Chloride and Sulphide ,Sulphate and Nitrate .

Q5:-Write down the formula of the following compounds. (1)Aluminium sulphate. (2)Calcium phosphate.

(3)Ammonium Nitrate. (4)Zinc carbonate.

Q6:-Calculate the molecular mass and equivalent mass of the following compound. (1)Na2CO3 (2)NH4Cl (3)H2SO4 (4)Al2(SO4)3

( Na=23; C=12; O=16; N=14; H=1; Cl=35; S=32; Al=27; )

Q7:-Sodium C arbonate reacts with ethanoic acid to form sodium ethanoate , CO2, Water.In an experiment 5.3g of sodium ethanoate reacted with 6g of ethanoic acid to form 8.2g of sodium ethanoate ,2.2g of CO2, 0.9G OF WATER. Show that this law verifies the law of conservation of mass.

Q.6 Write all the activities of NCERT in the unit 1to 3.

Holiday Home Work 2017-2018

Class –VIII Subject –Chemistry Q.1 What do you understand by combustible substances or fuels?

Q.2 Why is food regarded as a fuel for our body?

Q.3 Is burning of magnesium combustion?

Q.4 Give two examples of non-combustible substances.

Q.5 What is essential for combustion?

Q.6 What do you mean by ignition temperature?

Q.7 Does a matchstick burn by itself?

Q.8.What is the composition of the head of the matchstick?

Q.9.Which type of pollution occurs on burning wood?

Q.10 Name a liquid fuel which is used in homes?

Q.11 Write the full forms of-

(a) CNG (b) LPG

Q.12 When a burning charcoal piece is covered with a glass jar then the burning of the piece stops, why?

Q.13 Which will get fire first coal or kerosene?

Q.14 Which is the most common fire extinguisher?

Q.15 Which poisonous gas is produced due to incomplete combustion of a fuel?

Holiday Home Work

Class –XI Subject –Chemistry

Q1 Given that density of water is 1 g mL -1. What is its density in Kgm-

3? Q2 Define Law of multiple proportions.

Q3 How many electrons will be present in the sub-shells having ms value of -1/2

for n=4?

Q4 Why standard heat of formation of diamond is not zero though it is an element?

Q5 Write conjugate acids for the following Bronsted bases: HCOO- , NH3

Q6 For the following equilibrium Kc =6.3 X 10 -14 at 1000 k

NO(g)+O3(g) NO2(g) +O2 (g)

What is Kc for the reverse reaction?

Q7 What is the oxidation number of S in H2S2O7?

Q8 In the reaction H2S(g) + Cl2(g) 2HCl (g) + S(s)

Which species is reduced?

Q9 Calculate the molecular mass of CO2 , H2O

Q10 Out of 3d and 4s orbital , which is filled first and why?

Q11 What is the total number of sigma and Pi bonds in the following molecules?

a) C2H2

b) C2H4

Q12 What is the basic difference between the terms electron gain enthalpy

and electronegativity ?

Q13 State first law of thermodynamics. Give its mathematical expression.Q14 Using the equation of state pv =nRT , show that at a given temperature density

of a gas is proportional to gas pressure p ?

Q15 Give four conditions to have better yield of ammonia in Haber’s process

3H2(g) + N2 (g) 2NH3 ; H = -92.3KJ

Q16 Yellow light emitted from a sodium lamp has a wavelength ( ) of 580nm.

Calculate the frequency ( v) and wavenumber (v) of the yellow light.

Q.17 (a) What is meant by ‘10V’ H2O2 solution?(b) What causes the temporary and permanent hardness of water. (c) How does H2O2 behave as a bleaching agent?

Q18 Write the names of isotopes of hydrogen. What is the mass ratio of these

isotopes? Q19 You are told by your chemistry teacher to dissolve 4g of sodium

hydroxide

in 250 ml of solution . Find out

a) Strength of solution

b) Molarity of Solution

Q20 Calculate the uncertainity in the momentum of an electron if it is confined

to a linear region of Length 1x10 -10 metre.

Q21 How would you explain the fact that the first ionization enthalpy of sodium

is lower than that of magnesium but its second ionization enthalpy is

higher than that of magnesium?

Q22 Discuss the shape of the following molecules using VSEPR model

i. BeCl2

ii. BCl3

Q23 (a) What will be the conjugate bases for the following Bronsted acids:

HF , H2SO4

(b) What are buffer solutions? Give one example of natural buffer.

(i) syn gas

(ii) water gas shift reaction

(b) How does H2O2 behave as a bleaching agent?

Q25 (a) In terms of Charle’s law explain why -273oC is the lowest possible temperature.

(b) Critical temperature for Carbon Dioxide and methane are 31.1oC and

- 81.9oC respectively.Which of these has stronger intermolecular forces

and why?

Q26 Depict the galvanic cell in which the reaction

Zn (s) + 2 Ag+ (aq) Zn 2+ (aq) + 2Ag(s) takes place,

Further show:(i) Which of the electrode is negatively charged.

(ii) The carriers of the current in the cell

(iii) Individual reaction at each electrode.

Holiday Home Work

Class –XII Subject –Chemistry

Note: Solve Twenty sample papers of Previous Year Sample Papers

And also solve the following sample papers.

SAMPLE PAPER FOR PRACTICE -01 Time 3.0O HRS CLASS –XII MM: 70 SUBJECT- CHEMISTRY

General Instructions

1 All questions are compulsory2 Question nos.1 to 8 is very short answer questions and carries one mark each.3 Question nos.9 to 18 is short answer questions and carries two marks each4 Question nos. 19 to 27 is also short answer questions and carries three marks each5 Question nos.28 to 30 is long answer questions and carries five marks each6 Use log table if necessary. Calculators are not allowed.

Q.1 Arrange the following compounds in order of increasing boiling points.1-Chloro propane , Isopropyl chloride and 1- chloro butane

Q.2 Give the IUPAC name of the following compound (CH3) HC==CH COOH.

Q.3 For the reaction : N2 (g) + 3 H2 (g) → → 2 NH3 If ∆ [ NH3] / ∆t = 4 X 10-8 mol / L second ,what is the value of -∆ [H2] / ∆t ?

Q.4 Which of the following is most effective electrolyte in the coagulation of Fe2O3.H2O / Fe+++ sol ? KCl, AlCl3, MgCl2 and K4[Fe(CN)6]

Q.5 Which nucleic acid is responsible for protein synthesis in the cell?

Q.6 Draw the optical isomers of [Cr(OX)3] .

Q.7 Which Xenon compound is iso structural with ICl4- ?

Q.8 Write the structure of phenyl isopentylether .

Q.9 (1)For a weak electrolyte molar conductance in dilute solution increases sharply as its concentration in solution is decreased .Give reason .

(2)Write overall cell reaction for lead storage battery when the battery is being charged.

Q.10The rate constant of the reaction at 500K and 700 K are 0.02 Sec-1 and 0.07 sec-1 respectively .Calculate the value of activation energy for the reaction [Given R= 8.314 JK-1 Mol-1]

Q.11.Give reason (1) Why is Frenkel defect found in AgCl?

(2) What is the difference between Phosphorus doped and Gallium doped semiconductors

Q.12 (1) Draw the structure of phosphoric acid (H3PO2)

(2) Write a chemical reaction for its use as reducing agent

Q.13 State Raoult’s law for solution containing volatile liquids. Explain with suitable examples,the concept of maximum boiling Azeotropes .

Q.14(1)Give the electronic configuration of the d-orbitals of Ti in [Ti (H2O)6]3+ ion and explain why this complex is coloured ? (Atomic number of Ti= 22)

(2)Write IUPAC name of [Cr (NH3)3(H2O)3]Cl3

Q.15Show the mechanism of formation of ethane from Ethyl Alcohol.

Q.16Write a chemical equation each to represent .

(1) Carbyl amine reaction (2) Aldol condensation reaction

Q.17Sodium crystallizes in a B.C.C unit cell .Calculate the number of unit cell in 9.2 g of sodium? (Atomic mass of Na=23)

Q.18What is a semiconductor? Describe two type semiconductors?

Q.19(i) Calculate the charge in coulombs required for the oxidation of 2 moles of water to oxygen ?[Given If F=96500 C /mol-1

(ii) zinc /Ag oxide cell is used in hearing aids and electrical watches .The following reactions occur:

Zn (s) → Zn++ + 2e- E0 Zn++ / Zn = --0.76 V

Ag2O + H2O + 2e- → 2Ag + 2 OH- E0 Ag+ / A g = --0.46 V

Calculate : (i) Standard potential of the cell (2) Standard Gibbs energy

Q.20 Give reason for the following observations :

(i)Colloids stabilize due to Brownian movement .

(ii)Colloidal gold is used for intramuscular injection.

(iii)Cottrell’s smoke precipitator is fitted at the mouth of chimney used in factories.

Q.21The Government order directs the shopkeepers not to use polythene bags for delivering the customer’s purchase .

(i) Name the different type of polythene available .

(ii) Why did the Government impose such an order?

(iii) What are the values involved in the Government order?

Q.22Complete the following equations:

(i) Cu++ + 4NH3 →

(ii) XeF6 + PF5 →

(iii)XeOF4 + SiO2 →

Q.23 Give plausible explanation for each of the following :

(i) Ortho –nitrophenol is more acidic than Ortho-methoxy phenol.

(ii) Alcohols are easily protonated in comparison to phenols .

(iii)The relative ease of dehydration of alcohols is tertiary> secondary > primary

Q.24 Differentiates between the following pairs of the organic compounds:

(i) Ethanol and Ethanal (ii) Benzaldehyde and Phenol (iii) Aniline and Carboxylic acid

Q.25 Name one substance which act as both:

(I) Analgesics and Antipyretics (ii) Antiseptic and Disinfectants

(ii)Explain the following terms with suitable examples ;

(i)Broad spectrum antibiotics (ii) anionic detergents

Q.26 (i)Mention two common properties in sol and emulsion. (ii) Differentiates between Electrophoresis and Electro-osmosis. (ii) Heat of adsorption is greater for chemisorptions than for physisorption

Q.27(i)State the hybridization and magnetic behavior of [Fe(CN)6]3+

(ii)Explain the Crystal field splitting of ‘d’ orbital in the octahedral complex. (iii)Which of the two is more stable and why ? [K4(Fe(CN)6] and [K3 (Fe(CN)6]

Q.28(1) Identify the aliphatic biodegradable polyester which is used in packaging orthopedic devices .

(a) Write its full form. (b) Give the structure of monomers from which it is formed (c) Show the formation of polymer. (3)

(2) What is meant by Secondary and Tertiary structure of proteins. (2)Q.29 (1)An organic compound with the molecular formula C9H10O forms 2,4-

DNP derivatives reduces Tollen’s reagent And under goes Cannizzaro’s reaction . On vigerous oxidation , it gives 1,2-benzenedicarboxylic acid . Identify the organic compound . (3)(2)Give the uses of Freon 12 ,DDT ,Carbon tetrachloride and Iodoform .(2)

Q.30 (1)Write the three difference between DNA and RNA.(3) (2) What is Lanthanoid contraction? What are the consequences of Lanthanoid contraction.(2)

SAMPLE PAPER FOR PRACTICE -02 Time 3.0O HRS CLASS –XII MM :7 0

SUBJECT CHEMISTRY General Instructions

1 All questions are compulsory2 Question nos.1 to 8 are very short answer questions and carry one mark each.3 Question nos.9 to 18 are short answer questions and carry two marks each4 Question nos. 19 to 27 are also short answer questions and carry three marks each5 Question nos.28 to 30 are long answer questions and carry five marks each6 Use log table if necessary. Calculators are not allowed.

Q.1 If three elements P, Q and R crystallizes in a cubic unit cell with ‘P’ atoms at the corners, Q atoms at the cubic centre and ‘R’ atoms at the centre of each face of the cube then write formula of the compound.

Q.2. What is Henry’s law?Q.3 Write over all cell reactions for lead storage battery when the battery is being charged.Q.4 For the elementary reaction: 2A + B → 3C, if the rate of appearance of

‘C’ at time‘t’ is 1.3 X 10-4 mol L-1 Sec-1 , Calculate at this time . (i)Rate of the reaction (ii) Rate of disappearance of A Q.5 What is the unit of rate constant for first order reaction?Q.6 What do you mean by ‘Shape selective catalyst’?Q.7 Which is a strong reducing agent Cr++ and Fe++? Q.8 What is the unit of equivalent conductivity?Q.9 Explain the following terms with suitable examples

(i) F- Centre (ii) Frenkel defectQ.10 Classify each of the following as being either a p- type or an n- type semiconductor. Q.11 Define Azeotropes and explain briefly minimum boiling Azeotropes by taking

suitable examples. Q.12 The specific conductance of 0.05 N solution of an electrolyte at 298 K is 0.002 s cm-

1 .Calculate the equivalent conductance. Q.13 What are the reactions occurring at the cathode and anode in a Lechlanche cell? Q.14 For the reaction:

C12H22O11 + H2O →H+→ C6 H12 O6 + C6 H12 O6 Write (i) Rate of reaction expression (ii) Rate law equation (iii)Molecularity and order of reaction

Q.15 What do you mean by Kraft temperature and Critical Micelle concentration (C.M.C)Q.16 What is the difference between Multi molecular colloid and Macromolecular

colloids? Give one example of eachQ.17 Explain: (i) Zone refining (ii) Mond’s ProcessQ.18 How are XeO3 and XeOF4 are prepared ?Q.19 The edge length of NaCl unit cell is 564 Pm .What is the density of NaCl in g/cm3 Q.20 Ethylene glycol (Molecular mass =62 g/mol) is a common automobile antifreeze.

Calculate the freezing point of a solution containing 12.4 g of this substance in 100 g of water. given Kf for water +1.86 K Kg/mol

Q.21 Menthol is a crystalline substance with peppermint taste. A 6.2% solution of menthol in cyclohexane freezes at 1.95 oC .Determine molar mass of menthol.the freezing point and molar depression constant of cyclohexane are 6.5oC and 20.2 K / mol respectively .

Q.22 following chemical reaction is occurring in an electrochemical cell:Mg (s) + 2 Ag+ (0.0001M) → Mg++ (0.10 M) + 2 Ag

Given: Eo Mg++ / Mg = --2.36 V Eo Ag+ / Ag = +0.81 VFor the cell calculate / write : (i) : Eo value for the electrode 2Ag+ / Ag

(ii)Standard cell potential (Eo ) (iii) Give the symbolic representation of the above cell Q.23 Explain the following term (i) Freundlich Adsorption isotherm

(ii) Electrophoresis (iii) Gold numberQ.24 Outline the principle of the method used for refining of

(i) Nickel (ii) Zirconium (iii) Tin Q.25 (i) Extraction of Au by leaching with NaCN involve both oxidation and

reduction. Justify by giving equations for the reaction involved .(ii) Why is froth floation method selected for the concentration of sulphide ore ?

Q.26 Complete the following equations:(i) Cu++ + 4NH3 →(ii) XeF6 + PF5 → (iii) XeOF4 + SiO2 →

Q.27 (I) The following rate data were obtained at 300 k for the reaction2 NO2 (g) + F2 (g) 2 NO2 (g)

Expt. No. [NO2]0 [F2]0 Initial Rate( Mol L-1Min-1) 1 0.20 0.05 6.0 X10 -3

2 0.40 0.05 7.2 X10 -2

3 0.80 0.10 2.88 X10 -1

Determine : 1. Order of reaction 2. Rate law 3.Rate of reaction when[NO2] =0.50 Mol L-1 and [F2] =0.60 Mol L-1

(II) The rate constant of a reaction with respect to reactant ‘A’ is 6 minute -1 If we start with [A] =0.8 mol litre-1 .When would [A]reach the value of 0.08

mol-1? Q.28 Give the step in the preparation of

(i) Potassium di chromate from chromite ore(ii) Potassium permanganate from pyrolusite ore .

Q.29 (i) What is Lanthanoid contraction? What are the consequences of Lanthanoid contraction?(ii) The transition elements and their compounds act as good catalyst .

Q.30 Explain the following :(i) On oxidation of Ozone gas to KI solution ,violet colour vapours are obtained

why ?(ii) Draw the structure of XeF2 and XeOF2 .(iii) What happens when white phosphorus is heated with Conc. NaOH solution

in an inert atmosphere of CO2

(iv) With which neutral molecule is ClO-1 iso-electronic.(v) All bonds in the molecule of PCl5 are not equivalent .

SAMPLE PAPER FOR PRACTICE -03Time 3.0O HRS CLASS –XII MM :7 0

SUBJECT CHEMISTRY General Instructions

1 All questions are compulsory2 Question nos.1 to 8 are very short answer questions and carry one mark each.3 Question nos.9 to 18 are short answer questions and carry two marks each4 Question nos. 19 to 27 are also short answer questions and carry three marks each5 Question nos.28 to 30 are long answer questions and carry five marks each6 Use log table if necessary. Calculators are not allowed.

Q.1 If three elements A, B and C crystallizes in a cubic unit cell with ‘A’ atoms at the corners, B atoms at the cubic centre and C’ atoms at the centre of each face of the cube then write formula of the compound.

Q.2. Draw the Geometrical isomer of the compound [Co(NH3)2Cl2]?Q.3 Write over all cell reactions for lead storage battery when the battery is being charged.Q.4 For the elementary reaction: 2A + B → 3C, if the rate of appearance of

‘C’ at time‘t’ is 1.3 X 10-4 mol L-1 Sec-1 , Calculate at this time . (i)Rate of the reaction (ii) Rate of disappearance of A Q.5 What is the unit of rate constant for first order reaction?Q.6 What do you mean by ‘Shape selective catalyst’?Q.7 Which is a strong reducing agent Cr++ and Fe++? Q.8 What is the unit of equivalent conductivity?Q.9 Explain the following terms with suitable examples

(i) F- Centre (ii) Schottky defect Q.10 Classify each of the following as being either a p- type or an n- type semiconductor. Q.11 Define Azeotropes and explain briefly minimum boiling Azeotropes by taking

suitable examples. Q.12 The specific conductance of 0.05 N solution of an electrolyte at 298 K is 0.002 s cm-

1 .Calculate the equivalent conductance. Q.13 What are the reactions occurring at the cathode and anode in a Lechlanche cell? Q.14 For the reaction:

C12H22O11 + H2O →H+→ C6 H12 O6 + C6 H12 O6 Write (i) Rate of reaction expression (ii) Rate law equation (iii)Molecularity and order of reaction

Q.15 What do you mean by Kraft temperature and Critical Micelle concentration (C.M.C)Q.16 What is the difference between Multi molecular colloid and Macromolecular

colloids? Give one example of eachQ.17 Explain: (i) Zone refining (ii) Mond’s ProcessQ.18 How are XeO3 and XeOF4 are prepared ?Q.19 The edge length of NaCl unit cell is 564 Pm .What is the density of NaCl in g/cm3 Q.20 Ethylene glycol (Molecular mass =62 g/mol) is a common automobile antifreeze.

Calculate the freezing point of a solution containing 12.4 g of this substance in 100 g of water. given Kf for water +1.86 K Kg/mol

Q.21 Menthol is a crystalline substance with peppermint taste. A 6.2% solution of menthol in cyclohexane freezes at 1.95 oC .Determine molar mass of menthol.the freezing point and molar depression constant of cyclohexane are 6.5oC and 20.2 K / mol respectively .

Q.22 following chemical reaction is occurring in an electrochemical cell:Mg (s) + 2 Ag+ (0.0001M) → Mg++ (0.10 M) + 2 Ag

Given: Eo Mg++ / Mg = --2.36 V Eo Ag+ / Ag = +0.81 VFor the cell calculate / write : (i) : Eo value for the electrode 2Ag+ / Ag(ii)Standard cell potential (Eo ) (iii) Give the symbolic representation of the above

cell

Q.23 Explain the following term (i) Freundlich Adsorption isotherm (ii) Electrophoresis (iii) Gold number

Q.24 Outline the principle of the method used for refining of (i) Nickel (ii) Zirconium (iii) Tin

Q.25 (i)Extraction of Au by leaching with NaCN involve both oxidation and reduction. Justify by giving equations for the reaction involved .(ii) Why is froth floation method selected for the concentration of sulphide ore ?

Q.26 Complete the following equations:(i) Cu++ + 4NH3 →(ii) XeF6 + PF5 → (iii) XeOF4 + SiO2 →

Q.27 (I) The following rate data were obtained at 300 k for the reaction2 NO2 (g) + F2 (g) 2 NO2 (g)

Expt. No. [NO2]0 [F2]0 Initial Rate( Mol L-1Min-1) 1 0.20 0.05 6.0 X10 -3

2 0.40 0.05 7.2 X10 -2

3 0.80 0.10 2.88 X10 -1

Determine : 1. Order of reaction 2. Rate law 3.Rate of reaction when[NO2] =0.50 Mol L-1 and [F2] =0.60 Mol L-1

(II) The rate constant of a reaction with respect to reactant ‘A’ is 6 minute -1 If we start with [A] =0.8 mol litre-1 .When would [A]reach the value of 0.08

mol-1? Q.28 Give the step in the preparation of

(i) Potassium di chromate from chromite ore(ii) Potassium permanganate from pyrolusite ore .

Q.29 (i) What is Lanthanoid contraction? What are the consequences of Lanthanoid contraction?(ii) The transition elements and their compounds act as good catalyst .

Q.30 Explain the following :(i) On oxidation of Ozone gas to KI solution ,violet colour vapours are obtained

why ?(ii) Draw the structure of XeF2 and XeOF2 .

(iii) What happens when white phosphorus is heated with Conc. NaOH solution in an inert atmosphere of CO2

(iv) With which neutral molecule is ClO-1 iso-electronic.(v) All bonds in the molecule of PCl5 are not equivalent

SAMPLE PAPER FOR PRACTICE -04 Class- XII Subject – Chemistry Time Allowed 3 Hrs. MM.70 General Instructions:

All questions are Compulsory.

The question paper consist of 26 question divided in to five sections A, b, C, D and E .Section A consist of five question of I mark each . Section B comprises of 5 questions of 2 marks each. Section C comprises of 12 questions of 3 marks each. Section D comprises of 1 question of 4 marks. Section E comprises of 3 questions of 5 marks each.

Section A Q.1 Explain the relationship between radius (r) and the edge length (a) in the fcc unit cell. Q.2 Write the structure of 3-Methyl but-2-enoic acid .Q.3 Arrange the following in the increasing order of the boiling point :

CH3 O CH3 ,C2H5OH ,CH3COOH and CH3CHO Q.4 What type of the forces are responsible for the occurrence of Chemisorption ?Q.5 What do you mean by Shape Selective Catalyst?

Section BQ.6 98% (w/w) H2SO4 has the density 1.84 M .Calculate its Molarity. Molar mass of

H2SO4=98g/mol.Q.7 Show that the half life of a first order reaction is independent of initial concentration .Q.8 Define the following term:

(1) Primary structure of Protein (2) Non –essential amino acid Q.9 (1) Write the reaction of Glucose with Phenyl hydrazine.

(2) What is meant by denaturation of Protein . Q.10 (1) What are the different oxidation states shown by Actinoids ?

(2) Which of the 4d block elements may not be regarded as transition metals ?Section C

Q.11 (1) What are collectors in Froath floation process?(2) What do you meant by Mond’s process

Q.12 (1) Why does Milk show Tyndal effect ?(2) What are the dispered phase and Dispersion medium in the Milk?(3) Why is delta formed at the melting point of Sea and river water?

Q.13 (1) What type of Stoichiometric defect is shown by NaCl and why?(2) What type of Semi-conductor is formed when Germanium is doped with Boron?(3) Which one is an example of covalent solid :CO2 or SiO2

Q.14 Calculate the boiling point elevation for a solution prepared by adding 20 g of BaCl2 to 400 g of water.(Kb for water =0.52K Kg mol-1),Molar mass of BaCl2 =208 mol-1

Q.15 For the non-stoichiometric reaction : 2A + B → C + D , the following kinetic data were obtained in the three separate experiments all at 298 K.S.No Initial Conc.[A] Initial Conc.[B] Initial rate of reactionin mol L-1 s-1

1 0.1 M 0.1M 1.2 X10-3

2 0.1M 0.2M 1.2 X10-3

3 0.2M 0.1M 2.4 X10-3

(1) Calculate order of reaction w.r.t to ‘A’ and ‘B’(2) What is the value of ‘k’ and its units.

Q.16 Complete the following reactions:(1) MnO4 - + SO2 +H2O → (2) CrO4 2- + H+ → (3) Cr2O7 2- + Fe 2+ + H+→

Q.17 Write the state of hybridization, shape and IUPAC name of the complex [FeF6] 3-

Q.18 Write the chemical equations when : (1) Ethyl chloride is treated with alcoholic KOH

(2) Chlorobenzene is treated with CH3Cl in presence of anhydrous AlCl3

(3) Benzene reacts with excess of Cl2 in the presence of sunlight .Q.19 (1) Which of the two is more basic and why: C6H5NH2 or C6H5CH2NH2

(2) Give structure of the A,B,C and D in the following reactions:(1) C2H5Br KCN→ A LiAlH4 → B (2) C6H5COOH NH3→ C Br2 + KOH →

Q.20 (1) Give one example of an antihistamine drug.(2) Which one of the following is an example of Tranquilizers: Morphine ,

Equanil ,Aspirin, Chloroxylenol.(3) Name one artificial sweetener which is stable at room temperature .

Q.21 (1) What are the Biodegradable polymer ?Give one example .(2) Is PVC homopolymer or copolymer ?(3) Is Nylon -6,6 addition or condensation polymer ? Give reason.

Q.22 (1) Why is the single O-O bond weaker than single s-s bond ?(2) SbCl5 is more covalent than the SbCl3 ,Why?(3) Nitrogen exists as N2 where as Phosphorus exists as P4.Why?

Section DQ.23 Mr. Naresh is habitual of drinking od Alcohol .His father was also addicted to alcohol

and died due to damage of liver.His friend Ramesh advised him to leave drinking and start healthy living habits .He was taken to de-addiction centre and now his habit is under control .After reading the passage ,answer the following questions .(1) What values are associated with Ramesh?(2) Which alcohol is present in the alcoholic drinks ?(3) Which alcohol is most acidic in nature and Why?(4) Why are alcohols soluble in water ?

Section EQ.24 1. Write the two advantages of H2 –O2 fuel cell over ordinary cell .

(2) E 0 Cell of the following reaction is 0.59 V. A (s) + B2+(aq) → A2+ (aq) + B (s) Calculate its equilibrium constant .

(3) What is the secondary cell? Illustrate with the help of example.

Q.25 (a) (1)Why is BiH3 strongest reducing agent in group 15?(2)Why is HF weaker acid than HI ?(3)Which is stronger oxidizing agent :HOCl or HClO4

(b) Draw the structure of (1) H3PO2 (2) XeF4

Q.26 (a) Write the chemical reaction to illustrate the following name reaction :(1) Aldol condensation (2) Clemmensen reduction (3) Rosenmund reaction(b) How will you distinguish between 1) Benzoic acid and Benzaldehyde (2) Ethanal and Butan-2-one

Holiday Home Work 2017-2018

INNOVATION CLUB OF OGBS

Note : Make any one projects from the following projects OR Make any one innovative projects of your choice related to common problems .

Q.1 Visit any chemical Industries of your city and make a project to know the pollution status of your city due to the chemical industries of your city .

Q.2 What do you mean by Smog? What is the effect of smog in NCR area in the month of October and November

Q.3 Reminding the owner if keys are left in the vehicle.

Q.4 Mobile phone with inbuilt charger.

Q.5 Air conditioning system in Scooter and Motorcycle.

Q.6 Automatic spikes system near traffic signals.

Q.7 Keeping students fresh while reading

Dr. Atul Kumar Saxena

Incharge Innovation Club

Oak Grove Boys’ School

Jharipani

c) Why does a liquid vaporize below its boiling point in steam distillation

process?

Q.28 a) Convert:i. Propene to propane-1,2-diolii. Isopropylbromide to n-propylbromide

b) An alkene on ozonolysis gives butan-2-one and 2-methylpropanal.Give the structure and IUPAC name of Alkene. What

products will be obtained when it is treated with hot, concentrated KMnO

4?

OrComplete the equations:

Q29.Calculate the pH of a 0.10M ammonia solution. Calculate the pH after50.0mLof this solution is treated with 25.0mL of 0.10M HCl. The

dissociation constant of ammonia, Kb = 1.77 x 10-5.Or

Calculate the pH of the resultant mixtures:

10mL of 0.2M Ca(OH) 2 + 25 mL of 0.1 M HClQ30.Give reasons for the FO llowing:a) Why sodium and potassium carbonates cannot be prepared by

Solvay process.b) Why are alkali metals not found in nature?c) Sodium is less reactive than potassium why?d) Alkali metals are good reducing agents. Why?

e) Why Alkali metals are paramagnetic but their salts are

diamagnetic?Or

Complete the following reactions:a) Why does the solubility of alkaline earth metal carbonates and

sulphates in water decrease down the group?b) Arrange the following alkali metal ions in decreasing order of their

mobility:Li , Na , K , Rb , Cs. Explain

c) NaOH is a stronger base than LiOH. Explaind) Why are alkali metals kept in paraffin or kerosene?e) Why does lithium show properties uncommon to the rest of the

alkali metals?