Subject: Science
Class IX
Time Allowed: 3 hours
Max. Marks: 80
General Instructions:
- All questions are compulsory
- There are 36 questions in total. Questions 1 to 20 are objective type questions carrying one mark each.
- Questions 21 to 30 carry three marks each.
- Questions 30 to 36 carry five marks each.
- There is no overall choice.
1. Name the technique to separate camphor from salt.
2. What is endocytosis? Give one example.
3. Name the plastids which stores starch, oils and protein granules.
4. Why do we see water droplets on the outer surface of a glass containing ice cold water?
5. What is an antibiotic? Give its one example.
6. Why bryophytes are known as amphibians of the plant kingdom?
7. Can uniform linear motion be accelerated?
8. Name the group in which seeds are naked.
9. Convert the following temperature to the Celsius scale:
a) 293 K
b) 470 K
10. A substance X on heating gives Y and Z. Is X an element or a compound.
11. Can the displacement be greater than the distance travelled by an object.
12. Why plasma membrane is called semi permeable membrane?
13. What is the SI unit of gravity?
14. Do action and reaction act on the same body?
15. Against which disease BCG vaccine employed?
16. Which organelle detoxifies many poisons and drugs in a cell?
17. Which principle is involved in the working of a jet plane?
18. Which law of motion gives the measure of force?
19. If the mass of a body is 9.8 kg on the earth, what would be its mass on the moon?
20. What does the odometer of an automobile measure?
21. Why do we keep snake and turtle in the same class?
22. State the principle of separating two immiscible liquids by separating funnel. Describe an activity with diagram to separate a mixture of water and kerosene oil.
24. List three groups of plants which plants are referred to as vascular plants. Out of these which group is further classified on the basis of number of cotyledon? State its two characteristics.
25. Draw a labeled diagraph of mitochondria. Write the function of mitochondria.
26. a) A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.
b) Why does solution of sodium chloride not show Tyndall effect whereas the mixture of water and milk shows?
27. A ball thrown up vertically returns to the thrower after 6 sec. Find
i) The velocity with which it was thrown up
ii) The maximum height it reaches, and
iii) Its position after 4 sec
28. Answer the following:
a) Why making antiviral medicine is harder than making anti-bacterial medicine?
b) How can we prevent exposure to infectious microbe?
29. A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, the calculate:
i) The net accelerating force
ii) The acceleration of the train, and
iii) The force of wagon 1 on wagon 2
30. Differentiate the following:
i) Speed and velocity
ii) Uniform motion and non-uniform motion, and
iii) Force and thrust
31. Answer the following
a) Name any two air borne diseases. How does the disease causing microbes spread through air?
b) How does HIV virus spread from a patient to a healthy person? Given any two methods of transmission of this disease.
c) How does the immune system of our body function?
32. Answer the following:
i) Derive the relation s = ut + ½ at2, graphically.
ii) A motorcyclist drives from A to B with a uniform speed of 30 km/hr and returns back with a speed of 20 km/hr. Find its average speed.
33. a) Show diagrammatically the process of fractional distillation.
b) Explain why filter paper cannot be used to separate colloids.
c) Give one application of chromatography and given its one application.
34. Comment on the following statements:
a) Evaporation causes cooling
b) Rate of evaporation of an aqueous solution decreases with increases in humidity
c) Sponge though compressible is a solid
d) Ice is solid at 0oC, while water is liquid at room temperature
e) Sugar crystals dissolve faster in hot water than cold water.
35. Answer the following:
i) Derive the mathematical relation of Newton’s second law of motion.
ii) A bullet of mass 0.02 kg is fired from a gun weighing 7.5 kg. If the initial velocity of the bullet is 200 m/s, calculate the speed with which the gun recoils.
36. Answer the following
a) Make a comparison and write down ways in which plant cells are different from animal cells.
b) Draw neat diagram of a plant cell and label the parts
i) Production of ATP
ii) Suicidal bag of the cell
iii) Factory of ribosome.