SSLC Model Question Paper-1 SCIENCE Max Marks: 80 · PDF fileWhat are polyfunctional compounds? ... What are biodegradable and non-biodegradable pollutants give two examples for each

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SSLC Model Question Paper-1

SCIENCE Max Marks: 80 Time: 2 Hours 45 minutes

No. of Questions: 42 Code No. : 83E

Four alternatives are given for the each question. Choose the correct alternative and write the complete

answer along with its alphabet in the space provided. 1 × 10 = 10

1. Localised form of obtainining electrical energy can be done by using,

(A) Nucler power reactor (B) Thermal power station

(C) Solar cell panels (D) Hydroelectric power.

2. One of the reducing agent used in the extraction of amorphous silicon is,

(A) Magnesium (B) Coke (C) Sodium (D) Pohassium

3. Which one of the following is a carbohydrate?

4. In the following device the magnetic field linked to the coil changes continuously, producing very high voltage.

(A) A.C. dynamo (B) D.C. dynamo (C) Transformer (D) Induction coil

5. The transistor device used to produce desired frequency radio waves is,

(A) Oscillator (B) Amplifier (C) Rectifier (D) Transformer

6. Aqueous solution of the following is a conductor of electricity

(A) Glucose (B) Fructose (C) Sodium chloride (D) Sucrose

7. During germination the cotyledons appear above the soil in one of the plants.

(A) Turmeric (B) Coconut (C) Banana (D) Castor

8. A tissue that assists in the production blood cells.

(A) Epithelial (B) Bone (C) Reticular (D) Cartilage

9. A person shows less resistance towards microbial infections to the skin this is dueto

(A) Less immunity in the body (B) Lack of fat cells in adipose tissue

(C) Reduced counts of Macrophages (D) Anacmic

10. Indicator used to indicate gametes of pure dwarf plants

(A) TT (B) Tt (C) Tt (D) tt 11. Match the names of the vertebrates given in coloumn ‘A’ with the Charaiteristics listed in coloumns ‘B’ and ‘C’ and

write the answers in the space given below.

Answer the following questions in one sentences: 7 × 1 = 7

12. What is the name of the process used to prepare biodiesel?

13. How is the compound of silicon used in cutting and grinding tools prepared?

14. State Faraday’s first law of electromagnetic induction.

15. How do you convert an intrinsic semiconductor into a semiconductor in which charge carries are holes?

16. Use of D.D.T. should be minimized why?

17. What is the function of sensory nerves?

18. Cardiac muscles do not fatigue easily Give reason.

19. Draw a neat diagram of a petrol engine.

20. A tuning fork vibrates at a frequency of 100 Hz and the velocity of sound in air is 340 ms -1

21. The efficiency of a heat engine is 40%. If 1200 KJ of heat energy is supplied to it, calculate the amount of heat

energy that transformed into work.

22. How is safety glass prepared? What is its advantage?


OR Name the raw materials used in the manufacture of common glass. What should be the additive to get red coloured

glass?

23. Define saponification value of an oil or fat. What is its industrial significance?

OR What are polyfunctional compounds? Write the structural of an aromatic polyfunctional compound.

24. Write the balanced equations of the reactions taking place when molasses is subjected to fermentation.

OR In the manufacture of sugar, the sugar care juice is treated with calcium hydroxide why? What is the reason

for using coconut shell charcoal in the manufacture of sugar?

25. Name any two metals that can displace hydrogen and metals that cannot displace hydrogen from dilute acids

probable

OR Two probable reactions of alumina with coke and potassium are given below:

Which of these two reactions are probably correct? Justify your answer.

26. Draw a neat diagram of D.C. motor.

27. Write the circuit symbols of

(i) pnp transistor (ii) Diode

OR Name the junctions to be forward biased and reverse biased in a transistor circuit.

28. Electric current from a D.C. source is passed through molten (fused) sodium chloride. Predict the products

formed at the cathode and anode respectively. Justify your answer.

OR If the same quantity of electric charges are passed through the aqueous solutions of silver nitrate and copper

sulphate, the mass of silver and copper deposited at the cathode will be different, what is the reason for

this?

29. Mention any four differences between monocots and dicots.

OR How a gametophyte of bryophytes does develops into a sporophyte.

30. Name any two sexually transmitted diseases and write any two measures to control the same.

31. Arrange four ancestral forms of human beings in chronological order.

32. How are mutants produced? The production of mutant is not effectively being implemented. Why?

33. Why was Mendel selected pea plants for his experiment?

OR State the laws of heredity formulated by Mendel and explain.

34. Write the distinct parts of reflex arc with one function of each.


Answer the following Questions. 5 × 3 = 15

35. a) State Mendeleev’s periodic law.

How and why is it changed in modern periodic law? Moseley’s periodic law?

b) How do the following physical characteristics change in the periodic table across a period?

(i) Atomic size (ii) Ionisation energy

36. Draw a neat diagram of a nuclear power reactor.

37. Write the application of Doppler Effect of

(i) Ultrasonic’s (ii) Light waves (iii) Radio waves.

38. Ozone layer is get depleted why. Mention the effects of depletion of ozone.

OR What are biodegradable and non-biodegradable pollutants give two examples for each.

39. Draw the diagram of a typical dicotplat and label the parts.

Answer the following question 3 × 4 = 12

40. Draw a neat diagram of blast furnace used in the extraction of Iron.

41. Write the first three common stages of life cycle of all stars in order, explain the third stage.

42. Draw the diagram showing vertical section of human eye and label any two parts.


SSLC Model Question Paper-1 SCIENCE

(Alternative Sources of Energy, Environmental issues, Periodic Classification, Silicon)

Max Marks: 30 Time: 60 minutes

No. of Questions: Code No. : 83E

Instruction: - Write carefully and Explain about solar pond and its action to get extra marks.



1. The radiations in the sunlight that gives us the feeling of hotness is ______

a) Visible radiation b) Infra red radiation c) Red d) Ultra violet

2. Which one of the following is biodegradable pollutants?

a) Cowdung b) DDT c) Lead vapour d) Plastic

3. The atomic number of an element is 11, this element belongs to:

a) ‘s’ Block b) ‘p’ Block c) ‘d’ Block d) ‘f’ Block

1. The compound of silicon that can be used in calico printing is

a) Sodium silicate b) Aluminium silicate c) Silicon Silicate d) Calcium silicate

Answer the following Questions. 1 × 3 = 3 4. Why does our wet hand feel hot when we apply detergent on it?

5. In which part of the periodic table do we find mostly non-metals?

6. Why every chemist prefers to use “Borosil” glass for laboratory equipments?


7. a) How is the substance used in cutting and grinding tools prepared from silicon and

coke?

b) How do you obtain hydrogen gas from silicon and coke?

8. A student places an elements X in 18th group of the periodic table. What may be the

properties of that element?

9. a) State mendeleev’s periodic law

b) How and why is it changed in modern periodic law by Moseley.

10. Give scientific reasons:

i) The atomic size increases down the group in the periodic table.

ii)In the first period, Hydrogen and helium are not placed adjacent to each other.


11. What is the element produced when silicon dioxide reacts with magnesium? Write

the equation of the chemical reaction.

12. Which gas is main reason for depletion of ozone layer? Mention two effects of

depletion of ozone.

13. What is acid rain? Write 2 effects of acid rain on living being.


14. Why does the atomic size decrease from Sodium to Chlorine in the 3rd period?

15. What are degradable and non degradable pollutants? Give two examples for each.

16. List 3 factors responsible for the wind. State three limitations in harnessing wind

energy.



(GREEN PLANTS AND CHORDATES , PLANTS AND ANIMAL TISSUES , MICROBIAL DISEASES , Types of motion)



Instruction: - Write carefully and Explain about solar pond and its action to get extra marks.



1. Identify the pair of oviparous vertebrate group where fertilization and development are both external.

a. fishes and Amphiblans b. Reptiles and Birds c. Amphil]ians& Reptiles d. Birds & mammals

2. The structural and functional unit of nerve tissue is a. Neuron b. axon c. Dendrite d. myelin sheath.

3. The relation among wavelength (λ) frequency (n) and wave velocity is a. V=n/λ b. nλ=n c. v=λ/n d. v=nλ

4. In Reptiles the heart is a. Two chambered b. incompletely four chambered c. Three chambered d. four chambered

5. “Reduced platelet counts in blood” is one of the symptoms of the disease. a. Chickun gunya b. Dengue c. Bird flu d. syphilis.


6. What is epidermal tissue?

7. What is Thallus?

8. Write the main function of parenchyma tissue.

9. Which disease is caused by the mosquitoes Aedes aegiptil?

10. Child is suffering from stunted growth, retarded mental development, bow legs,

detective teeth. Name the disease.


11. If the frequency of a wave is 20Hz, what is its time period?

12. Write the main functions of epithelium.

13. Draw the diagram of a typical dicot plant and label the parts.

14. Name the four types of cells of xylem


15. Mention any 2 imperceptible motions.

16. Cardiac muscles do not fatigue easily. Give reason.


17. Write the modes of transmission of HIV

18. Mention any four characteristics of mammals.

19. If velocity of light wave is 3 × 108ms–1 and its frequency is 2 × 1014Hz, calculate the

wavelength and period of the wave.

20. Match the names of the vertebrates given in coloumn ‘A’ with the Characteristics listed in columns ‘B’ and ‘C’ and write the answers in the space given below: 1 × 4 = 4

A B C

1. Salamander a) Dermal scales withdistinct plates, twelve pairs of cranial nerves.

i) Oviparous, internal fertilization. Indirect development.

2. Hippocampus b) Dermal feathers with twelve pairs of cranial nerves

ii) Viviparous, fertilization and development is internal.

3. Shrews c) Exoskeleton of moist, granular skin, ten pairs of cranial nerves

iii) Oviparous, internal fertilization and direct development.

4. Chameleon d) Hairy skin, ten pairs of cranial nerves

iv) Oviparous, external fertilisation and indirect development.

e) Exoskeleton of dermal scales, the pairs of cranial nerves

v) Viviparous, internal fertilization, indirect development.

f) hairy skin, twelve pairs of cranial nerves

vi) Oviparous, external fertilization and direct



(Industrial Organic Chemistry, Sound, Metals , Electromagnetic Induction )





1. The enzyme that converts glucose into alcohol is

(a) Invertase (b) Zymase (c) Lypase (d) Amylase

2. Identify the organic compound among the following.

(a) Carbon dioxide(b) Water (c) Calcium Carbonate (d) Formaldehyde

3. A ship sends ultrasonic sound. It returns from seabed and it is detected after 6

second. The ultrasound wave travelled distance is.

(a) 4.5 km (b) 0.45 km (c) 90 km (d) 9.0 km

4. In the following device the magnetic field linked to the coil changes continuously, producing very high voltage. (a) A.C. dynamo (b) D.C. dynamo(c) Transformer (d) Induction coil

5. Heating of the ore in the absence of oxygen is called

(a) Calcination (b) Roasting (c) FrothFloatation (d) Hydraulic washing


6. Write the uses of the following Alloys.

a) Stainless steel b) Invar c) Brass

7. Write the classification of carbohydrates.

8. Sodium metal Stored in kerosene why?

9. Traffic control authorities used the radar gun why? OR

Astrologer used the Doppler Effect why?


10. What is flux? What is the flux used in iron extraction?

OR

What is the action of the following metals with water? Write the equations.

a) Zinc b) Iron


11. How ethyl alcohol is manufactured from sugar?

12. What is Doppler Effect? Doppler effect cannot be observed when the source of

sound and the observer are stationary, justify.

OR

Justify the statement “Ultrasonic waves are useful because they have high

frequency by giving two examples.

13. Which property of the diode is used to convert AC into D.C? Explain this

property.

14. Sodium displaces hydrogen from dilute acids. Violently but copper does not

displace hydrogen from dilute acids’ Why?

15. Small amount of copper is added to ornamental gold. Why?


16. Draw a diagram of Ac dynamo and label the parts.

17. a) State the Faraday's laws of electromagnetic induction

b) Symbolic representation of a transformer is given below

If the voltage in primary coil is 250V, then find the voltage in secondary coil.

18. Draw a neat diagram of blast furnace used in the extraction of Iron.

OR

Write the balanced chemical reaction that takes place in the blast furnace during

the extraction of iron.

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SSLC Model Question Paper-1 SCIENCE Max Marks: 80 · PDF fileWhat are polyfunctional compounds? ... What are biodegradable and non-biodegradable pollutants give two examples for each