Chapter Exam

Chapter 11: Carbon and its Compounds — Online MCQ Test

Q: Which of the following is an allotrope of carbon?

Answer: A. Diamond — Diamond, graphite, and fullerene are the well-known allotropes of carbon.

Q: What is the general formula for the homologous series of alkanes?

Answer: C. CnH2n+2 — Alkanes are saturated hydrocarbons with the general formula CnH2n+2.

Q: Which of the following describes the bonding in carbon compounds?

Answer: B. Covalent bonds formed by electron sharing — Carbon atoms share electrons with other atoms to complete their octet, forming strong covalent bonds.

SCIENCE · CLASS 10th · Tamil Nadu State Board

Practice Chapter 11: Carbon and its Compounds with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 10th SCIENCE. This chapter covers: This chapter covers carbon bonding allotropy homologous series and functional groups. Students study ethanol ethanoic acid chemical properties IUPAC nomenclature and soap detergent.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Carbon and its Compounds — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 10th SCIENCE — Chapter 11: Carbon and its Compounds, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is an allotrope of carbon?

A. Diamond ✓
B. Iron
C. Copper
D. Oxygen

Answer: A. Diamond
Diamond, graphite, and fullerene are the well-known allotropes of carbon.

What is the general formula for the homologous series of alkanes?

A. CnH2n
B. CnH2n-2
C. CnH2n+2 ✓
D. CnH2n+1

Answer: C. CnH2n+2
Alkanes are saturated hydrocarbons with the general formula CnH2n+2.

Which of the following describes the bonding in carbon compounds?

A. Ionic bonds formed by electron transfer
B. Covalent bonds formed by electron sharing ✓
C. Metallic bonds due to electron sea
D. Hydrogen bonds only

Answer: B. Covalent bonds formed by electron sharing
Carbon atoms share electrons with other atoms to complete their octet, forming strong covalent bonds.

How does the soap molecule effectively clean clothes?

A. By reacting chemically with the dirt
B. By dissolving in the water only
C. By forming micelle structures where the non-polar end traps grease ✓
D. By neutralizing the water acidity

Answer: C. By forming micelle structures where the non-polar end traps grease
Soap molecules form micelles where the hydrophobic tail captures grease, allowing it to be washed away.

Why do carbon compounds generally have low melting and boiling points?

A. They have strong ionic bonds
B. They have very weak intermolecular forces of attraction
C. They are highly reactive
D. They have covalent bonds within molecules but weak forces between molecules ✓

Answer: D. They have covalent bonds within molecules but weak forces between molecules
While covalent bonds are strong, the intermolecular forces between individual molecules are weak.