M.M: 90
SCIENCE [IX CLASS]
1. Question numbers 1 to 3 in section A are one mark [one word or one sentence. answer]
2. Question numbers 4 to 7 are two mark questions, to be answered in about 30 words.
3. Question numbers 8 to 19 are three mark questions, to be answered in about 50 words.
4. Question numbers 20 to 24 are five mark questions, to be answered in about 70 words.
5. Question numbers 25 to 42 is a one mark question in section B
SECTION - A
1. Classify soap and tin as element and mixture.
2. Draw velocity-time graph for an object moving with uniform velocity.
3. Define animal husbandry.
4. How does gravitational force of attraction between two objects change when the distance between them is reduced to half?
5. What is meant by concentration of a solution? A solution contains 50g common salt in 350g of water. Calculate the concentration of the solution.
6. A gas fills up the vessel completely. Explain why?
7. Leaves of a tree may get detached if we vigorously shake its’ branch. Explain.
8. The earth attracts the moon. Does the moon attract the earth? If it does, why does the earth not move towards the moon?
9. What is the difference between distance and displacement?
10. How does uniform linear motion differ from uniform circular motion? Give two points of differences.
11. What is meant by sustainable agriculture?
12. What is the role of epidermis in plants?
13. Why are lysosomes known as suicide bags?
14. Give reason :
(a) Steam produces more severe burns as compared to boiling water. (b) Temperature of a liquid does not change during evaporation.
15. Name A, B, C, D, E and F in the following diagram showing change in its state.
16. What are the six aims and objectives of plant breeding ?
17. Explain any two patterns of growing crops.
18. Identify the type of tissue in the following : Skin, bark of tree, bone.
19. A driver of train travelling at a speed of 15 m/s applies brakes and retards the train uniformly. The train stops in 5 seconds. Another train B is travelling on a parallel track with a speed of 10 m/s. Its’ driver applies the brakes and the train stops in 10 seconds retarding uniformly.
(a) Plot speed-time graphs for train A and train B on the same paper.
(b) Calculate graphically which of the trains travelled farther after the brakes were applied.
20. Using Newton
21. A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate :
(a) The maximum height to which it rises.
(b) The total time it takes to return to the surface of the Earth. (Take g = 9.8 m/s2)
22. (a) How much water should be mixed with 12ml of alcohol so as to obtain12% of alcohol solution ?
(b) Given a solution of substance ‘A’, how will you test whether it is saturated or unsaturated with respect to ‘A’ at given temperature ?
(c) What is the main difference between aqueous and non aqueous solution.
OR
(a) How much water should be added to 15g of salt to obtain 15% salt solution ?
(b) Give any two examples of pure substances.
(c) What is dispersed phase and dispersed medium in a colloid ?
23. (a) State the law of conservation of momentum.
(b) Explain how the third law of motion reasons the recoil of gun.
(c) A bullet of mass 20g is horizontally fired with a velocity of 150 m/s from a pistol of mass 2 kg. What is the recoil velocity of the pistol ?
OR
(a) Define force and its S.I. unit.
(b) The speed-time graph of a car of 1000kg mass is given below. From the graph answer the following:
(i) When is the maximum force acting on the car ? Why?
(ii) What is the retarding force ?
(iii) For how long is there no force acting ?
24. Draw an animal cell and label the following part: mitochondria, rough endoplasmic ,reticulum, Golgi apparatus and cell membrane.
OR
Make a comparison and write down ways in which plants cell are different from animal cells.
SECTION – B
25. A mixture containing ammonium chloride salt and sand is heated in a china dish to recover ammonium chloride from it. The inverted funnel is placed over china dish :
(a) Before heating
(b) After heating
(c) When fumes of ammonium chloride stop coming
(d) When fumes of ammonium chloride start coming
26. When magnesium is burnt in air, it produces magnesium oxide that appears to be like :
(a) wood ash (b) chalk powder
(c) table salt (d) powdered sugar
27. In iron sulphate, the particles of iron and sulphur are :
(a) visible (b) not visible
(c) visible under microscope (d) none of the above
28. In laboratory what precautions has to be taken with carbon disulphide :
(a) kept away from flame (b) kept away from carbon
(c) kept away from distilled water (d) kept away from iron sulphide.
29. What happens when iron nails are added to copper sulphate solution ?
(a) the solution becomes pale green and reddish brown copper metal gets deposited.
(b) the solution becomes colourless.
(c) there is no reaction.
(d) copper displaces iron.
30. What would be observed when zinc granules are added to dil sulphuric acid in a test tube ?
(a) zinc granules change to powder.
(b) colour of zinc changes from gray to white.
(c) the size of the zinc granules keeps decreasing.
(d) the surface of zinc metal becomes bright.
31. In a mixture of common salt, sand and ammonium chloride : first step of separation is :
(a) sublimation (b) filtration
(c) crystallization (d) distillation
32. Sublimation can be used to separate :
(a) volatile and non - volatile liquids. (b) volatile and non - volatile solids.
(c) miscible and immiscible liquids. (d) none of these.
33. Water in a container is heated uniformly from 0°C to 100°C. The volume :
(a) increases continuously (b) decreases continuously
(c) decreases up to 4°C and increases further (d) increases up to 4°C and decreases further
34. When water boils, its temperature :
(a) remains constant
(b) first decreases and then increases
(c) keeps on increasing as long as heating is continued.
(d) none of the above.
35. Adulterated arhar dal becomes plain yellow in colour due to adulterant :
(a) Metanil yellow (b) Turmeric
(c) Itching yellow (d) Malachite green
36. Following are five options for testing Metanil yellow in arhar dal :
(i) make powder of 5 gm of arhar dal,
(ii) put dal powder in a test tube,
(iii) add 2-4 drops of conc. HCI,
(iv) filter the content and keep the filterate separately,
(v) add 10 ml of water and well.
The correct sequence is :
(a) (i), (ii), (iii), (iv), (v) (b) (i), (iv), (v), (ii), (iii)
(c) (i), (iii), (iv), (v), (ii) (d) (i), (ii), (v), (iv), (iii)
37. Temporary mount of a living organism is made in :
(a) alcohol (b) acetone (c) glycerine (d) w a x
38. Cheek cells can be collected by :
(a) gently peeling of the inner cheek epithelium with a forcep
(b) scraping the inside of the cheek with a toothpick
(c) pulling out the inner layer of skin inside the cheek with a scalpel
(d) none of these
39. A permanent slide shows thin walled iso diametric cells with a large vacuole. The slidecontains :
(a) collenchyma cells (b) sclerenchyma cells (c) parenchyma cells (d) nerve cells.
40. Unbranched muscle fibres with characteristics striation are :
(a) unstriated muscle fibres (b) striated muscle fibres
(c) cardiac muscle fibres (d) involuntary muscle fibres
41. The colour of Sodium Chloride and Ammonium chloride respectively is:
(a) white and Yellow (b) yellow and white
(c) both are yellow (d) both are white
42. The formula used to calculate the percentage of water absorbed by raisins is. What does W2 indicates?
(a) Mass of raisins before absorption of water
(b) Mass of raisins after absorption of water
(c) Mass of water left in the beaker at the end
(d) Mass of water absorbed by the raisins
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