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Maximum Marks : 90 Maximum Time : 3 hours

General Instructions : Same as in CBSE Sample Question Paper

SECTION-A

1. Why evaporation is called surface phenomenon? 1

2. State Newton’s first law of motion. 1

3. How does Amoeba obtain its food? 1

4. (a) What do you mean by free fall?

(b) What do you mean by acceleration due to gravity? 2

5. Differentiate between columnar epithelium and cuboidal epithelium. 2

6. What is chromatography? Write its two application. 2

7. State two functions of cell membrane. 2

8. (a) What are macro-nutrients and why are they called macro-nutrients?

(b) How do plants get nutrients? 3

9. Why is the weight of an object on the moon 1

6th the weight on the earth? 3

10. (a) Identify the given figures.

(b) State in brief their structure.

(c) Describe the role performed by the two 3

11. What do you observe when ammonium chloride is heated in a hard glass test tube?

What is the special name given to the above change? 3

MODEL TEST PAPER – 2 (UNSOLVED)

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12. Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes and

30 seconds and then turns around and jogs 100 m back to point C in another 1 minute.

What are Joseph’s average speeds and velocities in jogging (a) from A to B (b) A to C?

3

13. (a) Draw the diagram of adipose connective tissue.

(b) Mention one region in the body where this tissue is present and state one function of

this tissue. 3

14. (a) State Newton’s third law of motion.

(b) In the following table the mass and speed of two bodies are given. Which body has

more momentum? Justify you answer.

Body Mass (kg) Speed m/s

A 1 10

B 2 9 3

15. A ball thrown vertically upwards rises to a height of 20 m. Calculate :

(i) the velocity with which the ball is thrown upwards and

(ii) the time taken by the ball to reach the highest point. (g = 10 m/s2) 3

16. Explain why :

(a) lysosomes are known as suicidal bags.

(b) mitochondria are known as power house of the cell.

(c) plasma membrane is known as selectively permeable membrane. 3

17. Calculate the force required to stop a car of mass 1000 kg and a loaded truck of mass

10,000 kg in 2 seconds, if they are moving with the same velocity of 5 ms–1. 3

18. Why is excess use of fertilisers detrimental for environment? 3

19. (a) Under which category of mixtures will you classify alloys and why?

(b) A solution is always a liquid. Comment.

(c) Can a solution be heterogeneous? 3

20. (i) A car of mass 1000 kg moving with a velocity of 40 kmh–1 collides with a tree

and comes to stop in 5s. What will be the force exerted by the car on the tree?

(ii) Why do droplets of water come out when a wet cloth is jerked? 5

OR

How much momentum will a dumb-bell of mass 10 kg transfer to the floor, if it falls

from a height of 80 cm? Take downward acceleration to be 10 ms–2.

21. How does fractional distillation differ from simple distillation process? Draw a

labelled diagram of the apparatus used in fractional distillation. 5

OR

Which separation techniques will you apply for the separation of the following?

(a) Sodium chloride from its solution in water

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(b) Ammonium chloride from a mixture containing sodium chloride and ammonium

chloride.

(c) Small pieces of metal in the engine oil of a car

(d) Different pigments from an extract of flower petals

(e) Butter from curd (f) Oil from water (g) Tea leaves from tea

(h) Iron pins from sand (i) Wheat grains from husk

(j) Fine mud particles suspended in water.

22.

The v-T graph of cars A and B which start from the same place and move along a

straight road in the same direction, is shown. Calculate (i) the acceleration of car A

between 0 and 8s. (ii) the acceleration of car B between 2s and 4s. (iii) the points of

time at which both the cars have the same velocity (iv) which of the two cars is ahead

after 8 sec. and by how much? 5

OR

(a) The velocity-time graph of a car is given below. The car weight 1000 kg.

(i) What is the distance travelled by the car in the first 2 seconds?

(ii) What is the braking force at the end of 5 seconds to bring the car to a stop

within one second?

(b) Derive the equation S = ut + 1

2at2 using graphical method.

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23. Compare in tabular form properties of solids, liquids and gases with respect to :

(i) Shape

(ii) Volume

(iii) Compressibility

(iv) Diffusion

(v) Fluidity or Rigidity 5

OR

(a) Define matter. Name the state of matter in which the forces between the constituent

particles are (i) Strongest, (ii) Weakest.

(b) Give reasons for the following :

(i) A liquid generally flows easily.

(ii) Ice at 0°C appears colder to the mouth than water at 0°C. Why?

(iii) Doctors advise to put strips of wet cloth on the forehead of a person having

high temperature.

24. (a) What are weeds? Give an example.

(b) Why should weeds be removed from cultivated fields?

(c) List five preventive measures that help in weed control. 5

OR

(a) Give three reasons in which insect pests attack plants which affect the health and

crop yield.

(b) Which two preventive measures are used before grains are stored for future use?

SECTION-B

25. A mixture of chalk, ammonium chloride and sodium chloride is dissolved in water and

then filtered. The filtrate consists of :

(a) ammonium chloride solution (b) sodium chloride solution

(c) chalk and ammonium chloride solution

(d) sodium chloride and ammonium chloride solution. 1

26. A bright iron nail is placed in a beaker containing copper sulphate solution. In the

beaker a sensitive thermometer is suspended and the temperature of copper sulphate

solution is recorded. The nail is taken out after 10 minutes and the temperature is again

recorded.

When the nail is taken out of copper sulphate solution after 10 minutes, its surface is

coated with :

(a) reddish deposit (b) greenish deposit (c) black deposit (d) white deposit. 1

27. While heating ammonium chloride and sodium chloride mixture, keep your face away

from the vapours because :

(a) chlorine vapours may cause irritation in the eyes.

(b) ammonia vapours may cause irritation in the eyes and nose.

(c) sodium chloride vapours may cause irritation in the eyes.

(d) ammonium chloride vapours may block the nose. 1

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28. Carbohydrates are stored in the human body as :

(a) starch (b) glucose (c) glycogen (d) sucrose 1

29. A small amount of the compound iron sulphide is taken in a test tube and dilute

sulphuric acid is added to it. It is observed :

(a) a brisk reaction takes place, but no gas is evolved

(b) a brisk reaction takes place, with the evolution of a sweet smelling gas

(c) a foul smelling gas is evolved along with a brisk reaction

(d) none of the above 1

30. Choose the correct observation about a solution of sugar in water prepared by you in

the laboratory.

(a) Its particles are seen by naked eyes.

(b) Its components can be separated by filtration.

(c) Solid particles settle at the bottom after sometime.

(d) It is transparent. 1

31. Glycerine or water is used for preparing temporary mount of a cell because glycerine

and water are :

(a) hypotonic to cell sap (b) isotonic to cell sap

(c) hypertonic to cell sap (d) none of these 1

32. Peter was bringing a bottle of tincture iodine from the market. Some iodine solution

splashed on his white cotton shirt and some on the yellow coloured cloth bag that he

was carrying. The stain on the cloth bag was yellowish brown while that on his shirt

was blue black. The most possible scientific reason for this is that the :

(a) Shirt was dyed with metanil yellow

(b) Shirt was starched after washing

(c) Cloth bag was starched but not the shirt

(d) Shirt had absorbed sweat 1

33. The amount of acid that should be added for the detection is :

(a) a few drops (b) many drops (c) hundred drops (d) only one drop 1

34. Tyndall effect is observed in which one of the following?

(a) True solution (b) Starch + Water (c) NaCl + Water (d) Alum + Water

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35. When we observe the melting of ice, the melting point of ice is a constant

temperature at which :

(a) both ice and water are present (b) only water is present

(c) only ice is present

(d) first ice and then only water is present. 1

36. Where would you look for neurons?

(a) In blood (b) In heart

(c) Root tip and shoot tip (d) In brain and spinal cord 1

37. The products of the reaction of zinc and dilute sulphuric acid are :

(a) zinc sulphide and hydrogen gas

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(b) zinc sulphate and sulphur dioxide gas

(c) zinc sulphate, water and hydrogen gas

(d) zinc sulphate and hydrogen gas 1

38. Which of the following is made of dead cells?

(a) sclerenchyma (b) collenchyma (c) blood (d) cardiac muscle. 1

39. When water boils, its temperature :

(a) decreases (b) increases

(c) remains the same (d) first increases and then decreases 1

40. Which of the following statements is correct?

(a) There are no intercellular spaces between cheek cells.

(b) Large intercellular spaces are present between cheek cells.

(c) Cheek cells float freely in a jelly-like matrix.

(d) All are incorrect. 1

41. A boy of mass 20 kg is moving with uniform velocity of 1 m/s. The net force acting

on the body is :

(a) 20 N (b) 1 N (c) zero (d) infinite 11

42. A water tanker filled up to 2

3of its height is moving with uniform speed. On sudden

application of brakes, water in the tank would.

(a) move backwards (b) move forwards (c) be unaffected (d) rise upwards 1