IX SCIENCE Maximum Marks : 80
Instructions:
Question numbers 1 to 4 are one mark questions.
Question numbers 5 to 13 are two mark questions,
Question numbers 14 to 22 are three mark questions,
Question numbers 23 to 25 are five mark questions,
Question numbers 26 to 41 are is a one mark question
SECTION - A
1. What can you say about the motion of a body whose distance-time graph is a line parallel to time-axis.
2. When a solution is said to be saturated ?
3. What is mari-culture ?
4. Name the phiysical quantity which is determined by the rate of change of linear momentum.
5. Name two biotic and two abiotic factors that affects crop production.
6. Explain dispersed phase and dispersing medium in relation to colloidal solution.
7. A car starts with velocity 10 m/s and accelerates at rate 5 m/s2 . Find the final velocity when the car has travelled a distance 30 m.
8. Draw a neat and labeled diagram for neuron.
9. Write two differences between plasma membrane and cell wall.
10. Why we wear cotton clothes during summer ?
11. A body covers a semicircle of radius 7 cm in 5 second. Find its velocity.
12. State universal law of gravitation. How the force between the two bodies is affected if the distance
13. It is dangerous to jump out of a moving bus. Explain why ?
14. Define (1) Green revolution (2) White revolution (3) Hybridisation of crops.
15. List any three factors for which variety improvement for crops is done. Explain any one in detail.
16. Define the following terms. (a) Latent heat of fusion (b) Sublimation (c) Evaporation
17. Show by an activity that the gases are highly compressible as compared to solids and liquids.
18. (a) Define momentum.
(b) A cricket player lowers his hands while catching the ball. Explain why ?
19. A cricket ball is dropped from a height of 20 m.
(i) Calculate the speed of the ball when it hits the ground.
(ii) Calculate the time it takes to fall through this height. (g 10 m/s2)
20. Draw a neat diagram for a plant cell. Label the following parts in the diagram :
(i) Cell wall (ii) Nucleus (iii) Chloroplast (iv) Vacuoles
21. Derive an expression for acceleration due to gravity on the surface of earth in terms of mass and radius of earth.
22. Draw a graph velocity versus time for a body starts to move with velocity ‘u’ under a constant acceleration a for time t. Using this graph derive an expression for distance covered ‘s’ in time ‘t’.
23. (a) What role vacuoles play in a typical plant cell ?
(b) What will happen if Golgi Apparatus is removed from the cell ?
(c) Why the inner membrane of Mitochondria deeply folded ?
OR
(a) What is plasma membrane ? Why it is called selectively permeable ?
(b) How Mitochondria and Plastid different from other organelles of the cell ?
(c) What role the smooth endoplasmic retaculum play in the liver cells of vertebrates ?
24. (a) State Newton
(b) Explain why is it difficult to hold a hose, which ejects a large amount of water at a high velocity.
(c) Why action and reaction don’t cancel each other.
OR
(a) State Newton
(b) The velocity time graph of a ball of mass 20g moving along a stright line on a long table is given in fig. How much force does the table exert on the ball to bring it to rest.
25. (a) Give any two point of difference between mixture and compound.
(b) Draw a labelled diagram of the apparatus used for fractional distillation.
OR
(a) Write any two point of differences between chemical and physical change ?
(b) State one instance where water undergoes a physical change and one in which undergoes a chemical change.
(c) Mention any two applications of chromatography.
SECTION B
26. Which of the following shows Tyndall effect :
(a) True solution (b) Colloidal solution
(c) Suspension (d) None of the above
27. Which of the following is stable when allowed to stand undisturbed for some time ?
(a) sugar solution (b) alum (c) salt solution (d) all of these
28. Which change occurs when zinc metal reacts with dil H2S04 acid ?
(a) Physical change (b) Physical and chemical change
(c) Chemical change (d) None of these
29. Which of the following precipitate is formed when sodium sulphate and barium chloride reacts :
30. One of the following is not visible in cheek cell :
(a) cell membrane (b) nucleus (c) cell wall (d) cytoplasm
31. On observing onion peel slide under low power of compound microscope which set of structure are clearly seen :
(a) cell wall, cell membrane, nucleus, cytoplasm (b) nucleus, cell membrane, vacuole, chromosome
(c) cell wall, cell membrane, mitochondria, vacuole(d) cell wall, nucleus, vacuole, chromosome
32. which one of the following is not a characteristic feature of parenchyma :
(a) Intercellular spaces are present between the cells
(b) each cell has a large vacuole
(c) composed of thin walled large living cells
(d) cells are isodiametric and non living
33. Identify the following slides in the correct order based on the features :
(a) nerve cell, parenchyma, sclerenchyma (b) sclerenchyma, nerve cell, parenchyma
(c) sclerenchyma, parenchyma, nerve cell (d) parenchyma, sclerenchyma, nerve cell
34. A mixture of sand, common salt and ammonium chloride can be separated by the process of :
(a) filtration (b) distillation (c) sublimation (d) all of these
35. Which one of the following figures describe the process of sublimation ?
36. Which of the following reagent is used to test the presence of starch in the food storage ?
(a) iodine (b) methylene blue
(c) Benedict’s reagent (d) dilute hydrochloric acid
37. Which of the under mentioned food groups will not turn blue black when treated with iodine ?
(a) rice, potato, bread (b) bread, wheat, corn flour
(c) rice water, boiled potato, corn starch (d) dal, fish, meat
38. Sulphur
(a) water (b) carbon disulphide
(c) both (a) and (b) (d) neither (a) nor (b)
39. Which compound is formed when iron is heated with sulphur ?
(a) FeS (b) Fe2S3 (c) FeS2 (d) Fe2S
40. Below are the melting points of ice as given by four students, which one is correct :
(a) 0°C (b) 273 K (c) 100°C (d) 373 K
41. The correct set up for finding the melting point of ice is :
(a) A (b) B (c) C (d) none of these
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