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Class 9 Olympiad Science Mock Test 4
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Class 9 Olympiad Science Mock Test 4
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25 Questions

1. A particle is moving along a circular track of radius 1 m with a uniform speed. Find the ratio of the distance covered and the displacement in half revolution.
2. At what temperature should all the gases occupy zero volume?
3. Which of the following synthesises protein?
4. What is the ratio of number of atoms of respective elements potassium, chlorine and oxygen present in 245 g of KClO3?
5. A car covers 30 km at a uniform speed of 60 km h–1 and the next 30 km at a uniform speed of 40 km h–1. Find the total time taken.
6. Which of the following conclusions cannot be drawn on the basis of Rutherford's atomic model?
7. Which of the following solutions show Tyndall effect?
8. Which disease spread when the patient coughs?
9. A ball dropped from a 20 m height loses 40 % of its energy on hitting the ground. Find to what height does the ball rebound?
10. Which of the following is a diploblastic animal?
11. When the force retards the motion of a body, the work done by the force during retardation is
12. Match the entries in Column-I with respect to entries in Column-II.
13. In a 100 m race between Ramesh and Suresh, Ramesh wins the race. Assuming they run with uniform acceleration. Which of the following is correct?
14. Who is called the father of Green Revolution?
15. In a game of tug of wars, a condition of equilibrium exists. Both the teams pull the rope with a force of 104 N. Find the tension in the rope.
16. Which one of the following statements about the evaporation of water is not true?
17. The presence of which of the following is useful in separating ferns and mosses into different taxonomic categories?
18. The approximate production of sodium carbonate per month is 424 x 106 g while that of methyl alcohol is 320 x 106 g. Which of the following is produced more in terms of number of moles?
19. The acceleration of a particle 'X' remains constant in magnitude but not in direction, which of the following paths does particle 'X' can have?
20. Which of these is essential to synthesise proteins?
21. A wooden cylinder floats vertically in water with one fourth of its length immersed. What will be the density of wood?
22. A boy lifts a book of known weight from the surface of a table. To calculate the work done, what does he need to know?
23. A block of mass 1 kg slides down on an inclined plane with the angle of inclination of 30o. Find the work done as the block slides through 50 cm.
24. Which of the following properties of sound is affected by a change in the air temperature?
25. A marine survey ship sends a sound wave straight to the sea bed. It detects an echo 4.0 s later. What is the approximate depth of the sea?

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