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Class 10 Olympiad Science Mock Test 8
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Class 10 Olympiad Science Mock Test 8
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25 Questions

1. What is the colour of Copper (II) Chloride formed in the given chemical equation?
CuO + 2 HCl -> CuCl2 + H2O
2. Read the given information and identify the gland.
Secreted by endocrine glands located on the top of kidneys.
Deficiency can cause Addison's disease.
3. In pea plants, tall plants are dominant over short plants. If two heterozygous tall plants are crossed, what percent of the offspring will be short?
4. A tube light draws 10 W when connected to a 12 V supply. How will its resistance change when it is connected to a 6 V supply?
5. Which of the labelled arrows represents the smallest amount of energy transferred between organisms and the largest amount of energy lost to the ecosystem?
6. Identify the correct ratio of the hydrogen atoms present in propane and propyne.
7. Identify the acid used for producing explosives.
8. What happens if washing soda crystals are exposed to air?
9. Which organism reproduces by fragmentation?
10. Which organism also reproduces in the same way as the organism shown below?
11. The main source of energy in the sun is due to
12. Identify the gas that is evolved as gas bubbles in the test tube.
13. What type of reaction occurs when mercuric oxide is strongly heated in a crucible?
14. An electric bulb is rated 220 V, 100 W
The power consumed by it when operated on 110 volt will be
15. The correct order of ionic radius of the given ions is
O-2 , Na+ , F- and Mg+2
16. When heated, solid 'X' gives off a gas, turns lime water milky, residue reacts with dilute acid and also with aqueous alkali. What is 'X'?
17. Identify a substance that cannot be added in a composting pit to prepare compost.
18. When a small magnetic needle is placed below a horizontal conductor carrying a strong current from west to east, its north pole will point in the direction of
19. Ancestral history of an organism is called
20. How long does the impression of an image remain on the human brain?
21. A sudden irreversible change that takes place in the genotype of an organism is called
22. What is immaterial for an electric fuse wire?
23. Identify the formula of super phosphate of lime.
24. Which of these reproduces by regeneration and budding?
25. A particular metal forms an invisible protective layer and prevents further oxidation. Identify the metal, its oxide and chemical formula.

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