Worksheet

Here are 20 multiple-choice questions (MCQs) from the chapter "Carbon and Its Compounds" (Class 10):

1. Carbon Forms Covalent Bonds Because:

A) It has 4 valence electrons

B) It readily loses 4 electrons

C) It readily gains 4 electrons

D) It forms ionic bonds

2. Which of the following is a saturated hydrocarbon?

A) C₂H₂

B) C₂H₄

C) C₂H₆

D) C₆H₆

3. The general formula of alkynes is:

A) CₙH₂ₙ₊₂

B) CₙH₂ₙ

C) CₙH₂ₙ₋₂

D) CₙH₂ₙ₊₁OH

4. Which of the following is an allotrope of carbon?

A) Graphite

B) Silica

C) Phosphorus

D) Sulfur

5. Ethanol reacts with sodium to form:

A) Sodium ethanoate

B) Sodium ethoxide

C) Ethyl chloride

D) Sodium hydroxide

6. The functional group present in aldehydes is:

A) -OH

B) -CHO

C) -COOH

D) -CO

7. Which of the following is used for the hydrogenation of vegetable oils?

A) Ni

B) Cu

C) Ag

D) Zn

8. Which of the following statements is incorrect about diamond?

A) It has a tetrahedral structure

B) It is a good conductor of electricity

C) It is the hardest known natural substance

D) Each carbon atom is bonded to four other carbon atoms

9. Which of the following is a homologous series?

A) Alkanes

B) Alkenes

C) Alkynes

D) All of the above

10. The IUPAC name of CH₃COOH is:

A) Methanoic acid

B) Ethanoic acid

C) Propanoic acid

D) Butanoic acid

11. The process of converting ethanol to ethanoic acid is called:

A) Hydrogenation

B) Oxidation

C) Saponification

D) Esterification

12. Which of the following compounds does not decolorize bromine water?

A) Ethene

B) Ethyne

C) Ethane

D) Propene

13. Which of the following is an unsaturated hydrocarbon?

A) Propane

B) Butane

C) Ethene

D) Methane

14. Which of the following is the main component of vinegar?

A) Ethanol

B) Ethanoic acid

C) Methanol

D) Formic acid

15. The molecular formula of benzene is:

A) C₆H₆

B) C₆H₁₂

C) C₆H₁₀

D) C₆H₈

16. The addition of hydrogen to unsaturated hydrocarbons is called:

A) Oxidation

B) Hydrogenation

C) Reduction

D) Esterification

17. Soap is formed by the reaction of:

A) Alcohol and acid

B) Fat and base

C) Fat and acid

D) Alcohol and base

18. The substance used for making soaps is:

A) Sodium carbonate

B) Sodium hydroxide

C) Sodium chloride

D) Sodium bicarbonate

19. Which of the following is an aromatic hydrocarbon?

A) Ethane

B) Propane

C) Benzene

D) Butane

20. Hard water does not form lather with soap because it contains:

A) Sodium ions

B) Potassium ions

C) Magnesium and calcium ions

D) Ammonium ions

Let me know if you need the answers or any modifications!