Consider the following statements I. Diamond and graphite are allotropes of carbon.

Science & Technology ·Previously asked in JKPSC Combined Competitive Examination (JKCCE) 2025

View the full solved paper: GS Paper I (Set B)

Question

Consider the following statements:

I. Diamond and graphite are allotropes of carbon.

II. Both diamond and graphite are good conductors of electricity.

Which of the statements given above is/are correct?

  1. A. I only (Correct answer)
  2. B. II only
  3. C. Both I and II
  4. D. Neither I nor II

Correct Answer

Option A — I only

Detailed Solution & Explanation

The correct answer is I only.

Key Points

  • Statement I: Diamond and graphite are allotropes of carbon — both consist of pure carbon atoms arranged differently ✓.
  • Statement II: Diamond is an electrical insulator (all four valence electrons are in covalent bonds, none are free), while graphite is a good conductor (each carbon has one delocalized electron in pi bonds).
  • Both being conductors is incorrect ✗.
  • Only Statement I is correct.