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Class 10 Olympiad Science Mock Test 3
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Class 10 Olympiad Science Mock Test 3
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25 Questions

1. A convex lens of power 4D is placed at a distance of 40 cm from a wall. At what distance from the lens should a candle be placed so that its image is formed on the wall?
2. The manufacturer of a lamp claims that 80% of the power of lamp is emitted as light.
The light energy emitted by the lamp is
3. The Process of embryo formation without fertilization is
4. Which of the following statements is true?
5. Fleming's left hand rule is used to find the direction of the magnetic field around a
6. Which of the following parts within the uterus prevents the mixing of the blood of the foetus with that of the mother?
7. The information given below refers to the hormone:
Secreted by endocrine glands located on top of the kidneys
Converts glycogen into glucose
Deficiency can cause Addison's disease
Identify the hormone.
8. Gun metal contains
9. The ozone layer is destroyed due to
10. Which bulb has the lowest resistance?
11. Process of embryo formation without fertilization
12. Which of the following is/are a renewable source of energy?
13. Identify the type of reaction illustrated below.
H2+ Cl2 -> 2HCl
14. The peppered white moth Biston betularia is very common in England. This moth rests on branches of trees and is able to blend with the background. The darker melanic form appeared much later and is plentiful in industrial regions. The original white form is absent in polluted regions because
15. What is a natural optical instrument?
16. Atomic size increases in a group due to the
17. Identify the pathway of carbon dioxide after the exchange of gases in lungs.
18. What is the shape of the check dams?
19. Identify the path of flow of electricity in a domestic circuit.
20. Which of the following is an example of a reflex action?
21. Where does fertilisation take place in plants?
22. Which factor effects the speed of the rotation of a DC motor?
23. Which of the following is NOT true concerning photosynthesis in green plants?
24. Identify the correct ratio of the hydrogen atoms present in propane and propyne.
25. The mechanism of climbing in some plants is

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