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Q8 (CDS-II/2021) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

Which of the following carbon allotropes is/are good conductor(s) of electricity ? 1. Diamond 2. Graphite 3. Fullerene Select the correct answer using the code given below :

Result
Your answer: —  Â·  Correct: C
Explanation

Carbon allotropes exhibit diverse electrical properties based on their bonding structures. Graphite is a very good conductor of electricity because each carbon atom is sp2-hybridized, forming three covalent bonds and leaving one delocalized electron per atom that can move freely through the hexagonal layers [2]. In contrast, diamond is an electrical insulator because all four valence electrons are involved in strong sp3 covalent bonds, leaving no free electrons to carry a current [2]. While fullerenes like C60 have unique electronic properties and can act as electron acceptors, they are generally characterized as having low conductivity or being non-conductors in their pure molecular form [1]. Therefore, among the options provided, only graphite is a recognized good conductor of electricity.

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > Allotropes of carbon > p. 61
  2. [2] Science , class X (NCERT 2025 ed.) > Chapter 3: Metals and Non-metals > Table 3.1 > p. 40
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SIMILAR QUESTIONS

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NDA-II · 2012 · Q76 Relevance score: 3.32

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Consider the following statements regarding diamond : 1. It is an allotrope of silicon. 2. It is a bad conductor of heat and electricity. 3. Tt is the hardest substance. 4. It burns to produce carbon dioxide Which of the statements given above are correct?