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Class 10 Olympiad Science Mock Test 2
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Class 10 Olympiad Science Mock Test 2
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25 Questions

1. In which two body organs does reabsorption of water take place?
2. Which of the following is NOT a characteristic feature of sexual reproduction?
3. In-vitro fertilisation is suitable for women
4. The free living nitrogen fixing bacteria present in air is
5. Which of the following changes to a wire will double its resistance?
6. Which calcium compound does NOT increase the pH of acidic soils?
7. SO2 can act as a/an
8. What is the least speed of wind needed to generate electricity?
9. Formula of Gypsum is
10. What happens to the air as it passes through the nasal cavity?
11. An electric heater of resistance 200Wdraws a current of 1A. Calculate its power.
12. Which feature of carbon enables it to form a large number of compound(s)?
13. Which of the following is a dibasic acid?
14. Which method is employed for obtaining a pure metal?
15. Which of the following organisms are secondary consumers in any food web?
16. Which type of electrons in an orbital/shell determine the nature and type of bonds formed by an element?
17. The ratings of three bulbs P, Q, R are 120V/24W, 120V/60 W and 240V/60 W respectively. Identify the ascending order of their resistance.
18. Which law states that the direction of the induced current is such that it always opposes the cause (motion of conductor) which produced it?
19. What happens when few granules of zinc are added to 5 ml of sodium hydroxide solution and warmed?
20. Which of the following statements is true of analogous structure?
21. What is the function of the sensory neuron?
22. What are the advantages of using a periodic table?
23. An incident ray strikes a plane mirror at an angle of incidence of 50o. What is the decrease in the angle of reflection, if the incident ray moves to an angle of incidence of 30°?
24. Identify the weakest acid from the following.
25. An electric fan rated 50 W operates 20 hours in a day. What is the cost of the energy to operate it for 30 days at 2 per kWh?

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