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Class 10 Olympiad Science Mock Test 7
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Class 10 Olympiad Science Mock Test 7
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25 Questions

1. Why do flowering plants show double fertilisation?
2. Find the current passing through 6 Ω (Ohms) resistor in the given circuit.
3. A man is standing still while a plane mirror is moving away from him at a speed of 4 m s-1. How fast does he see his image moving away?
4. Which of the following sequences is correct to test for the presence of starch in a leaf?
P: Boil the leaf in alcohol in a water bath
Q: Add iodine solu on
R: Wash the leaf in hot water
S: Boil the leaf in water
5. Identify a strong acid.
6. The elements with atomic numbers 4, 12, 20, 38, 56, 88 belong to which of the given groups?
7. Which of the following term refers to plants and animals?
8. Identify the characteristics of a chemical reaction.
9. Sunil viewed a fish under water straight down (90° to the surface). fish
Where will Sunil be able to see the image of fish?
10. A magnet is inserted into the centre of a coil and an e.m.f. is induced across the coil. The magnitude of the induced current depends on
11. Smelting is done in
12. Identify the given fuels in ascending order of their calorific values.
(i) Coal (ii) Dung cake (iii) Kerosene oil (iv) Hydrogen gas
13. What is the difference in the formulae and molecular masses of CH3OH and C2H5OH?
14. Which of the following is/are formed when aluminium oxide reacts with NaOH solution?
15. Sardar Sarovar dam was constructed on
16. How much current is drawn by a bulb rated 100 W and designed for a mains supply of 250 V when operated normally?
17. Which of the following equation best describes the formation of rust?
18. What is the non-polar part of soaps made of?
19. Which of the following steps are used to treat industrial wastes and reduce pollution?
(i) Recycle the wastes
(ii) Discharge the wastes into the sea
(iii) Treat and neutralise harmful chemicals in the wastes
20. Reproduction in bryophyllum takes place by
21. Which of the following glands if not function well leads to body loss, thirst all time and high concentration of glucose in urine?
22. Structural and functional unit of environment is
23. Which of the following always produces a diminished image of an object?
24. The study of heredity and variations is called
25. A 2 V battery is connected across a 4 Ω resistor.
What is the heat produced in 10 seconds?

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