Carbon and Its Compounds CBSE Class 10 MCQ & Practice Questions

Practice Carbon and Its Compounds MCQs for CBSE Class 10 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

Carbon and Its Compounds Revision Guide for CBSE Class 10 Chemistry

Carbon and Its Compounds is part of CBSE Class 10 Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

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Top 15 Carbon and Its Compounds MCQs with Answers

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CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

1. Carbon is tetravalent because it has:

A. 1 valence electron
B. 2 valence electrons
C. 4 valence electrons
D. 8 valence electrons

Answer: C

Explanation: Carbon forms four covalent bonds.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

2. Which homologous series has general formula CnH2n+2?

A. Alkenes
B. Alkynes
C. Alkanes
D. Alcohols

Answer: C

Explanation: Alkanes are saturated hydrocarbons.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

3. Which functional group is present in ethanol?

A. -CHO
B. -OH
C. -COOH
D. -CO-

Answer: B

Explanation: Ethanol contains hydroxyl group.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

4. Ethene decolourises bromine water because it:

A. Is saturated
B. Undergoes addition reaction
C. Is acidic
D. Forms precipitate

Answer: B

Explanation: Double bond undergoes addition.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

5. Soap cleans by forming:

A. Salt bridge
B. Micelles
C. Alloys
D. Polymers

Answer: B

Explanation: Soap molecules form micelles around grease.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

6. Hard water reduces soap efficiency because:

A. Soap evaporates
B. Scum forms with Ca2+/Mg2+
C. Soap becomes acid
D. Soap polymerises

Answer: B

Explanation: Calcium and magnesium form insoluble salts.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

7. Which is a saturated hydrocarbon?

A. Ethene
B. Ethyne
C. Methane
D. Benzene

Answer: C

Explanation: Methane is an alkane.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

8. The suffix for carboxylic acids is:

A. -ol
B. -al
C. -oic acid
D. -one

Answer: C

Explanation: Carboxylic acids end with oic acid.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

9. Vinegar contains:

A. Methanoic acid
B. Ethanoic acid
C. Benzoic acid
D. Oxalic acid

Answer: B

Explanation: Vinegar is dilute acetic (ethanoic) acid.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

10. Complete combustion of methane produces:

A. CO and H2
B. CO2 and H2O
C. C and H2
D. CH3OH

Answer: B

Explanation: Complete combustion gives CO2 and water.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

11. Polymerisation of ethene forms:

A. PVC
B. Polythene
C. Nylon
D. Bakelite

Answer: B

Explanation: Addition polymerization yields polythene.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

12. Which bond is present in ethyne?

A. Single
B. Double
C. Triple
D. Ionic

Answer: C

Explanation: Ethyne contains a C≡C triple bond.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

13. Catenation means:

A. Bonding with metals
B. Self-linking of carbon atoms
C. Hydrogen bonding
D. Ionic bonding

Answer: B

Explanation: Carbon forms chains with itself.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

14. Which compound belongs to alcohol family?

A. CH3COOH
B. C2H5OH
C. CH4
D. C2H4

Answer: B

Explanation: Ethanol is an alcohol.

CBSE Class 10 Chemistry · Carbon and Its Compounds · Very Very Hard

15. Which fuel burns with a clean blue flame?

A. Coal
B. LPG
C. Wood
D. Paper

Answer: B

Explanation: LPG burns more completely.