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Carbon & Its Compounds 25 PYQ-Based MCQ Practice Quiz

 

Class 10 Science – Carbon & Its Compounds
25 PYQ-Based MCQ Practice Quiz

High-yield CBSE PYQ-pattern MCQs covering hydrocarbons, ethanol, ethanoic acid, soaps, detergents & reactions.

1. The valency of carbon is:

Difficulty: Easy





Answer: 4
Carbon forms four covalent bonds.

2. Which property enables carbon to form long chains?

Difficulty: Easy





Answer: Catenation

3. Which of the following is a saturated hydrocarbon?

Difficulty: Easy





Answer: Methane

4. The general formula of alkanes is:

Difficulty: Easy





Answer: Câ‚™H₂â‚™₊₂

5. Which reaction converts vegetable oil into ghee?

Difficulty: Moderate





Answer: Hydrogenation

6. Ethanol reacts with sodium to produce:

Difficulty: Moderate





Answer: Hydrogen

7. Functional group present in ethanoic acid is:

Difficulty: Easy





Answer: –COOH

8. Vinegar is a dilute solution of:

Difficulty: Easy





Answer: Ethanoic acid

9. Which substance turns blue litmus red?

Difficulty: Easy





Answer: Ethanoic acid

10. Esterification occurs between:

Difficulty: Moderate





Answer: Alcohol + Acid

11. Which is used as an industrial solvent?

Difficulty: Moderate





Answer: Ethanol

12. Which carbon compound is poisonous?

Difficulty: Moderate





Answer: Methanol

13. Which compound is used for making soaps?

Difficulty: Moderate





Answer: Fatty acid salt

14. The cleansing action of soap is due to:

Difficulty: Hard





Answer: Emulsification

15. Why soaps do not work in hard water?

Difficulty: Hard





Answer: Formation of scum

16. Which is an unsaturated hydrocarbon?

Difficulty: Easy





Answer: Ethene

17. Homologous series have same:

Difficulty: Moderate





Answer: Functional group

18. Which gas is released during fermentation?

Difficulty: Moderate





Answer: Carbon dioxide

19. Which compound is formed when ethanol is oxidized?

Difficulty: Hard





Answer: Ethanoic acid

20. Detergents are effective in hard water because:

Difficulty: Hard





Answer: They do not form precipitates

21. Which test is used to detect unsaturation?

Difficulty: Moderate





Answer: Bromine water test

22. Which compound is responsible for hardness in soap solution?

Difficulty: Hard





Answer: Calcium ions

23. Which hydrocarbon burns with a sooty flame?

Difficulty: Moderate





Answer: Ethene

24. Which compound has –OH functional group?

Difficulty: Easy





Answer: Alcohol

25. Which process converts sugar into alcohol?

Difficulty: Moderate





Answer: Fermentation
© StudyBeacon · Class 10 Science · Carbon & Its Compounds
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