Q: Which one of the following statements is NOT correct?
(a)Diamond is hard due to extended covalent bonding in it
(b)Fullerene is composed of five and six membered rings
(c)Diamond is a good conductor of electricity
(d)Graphite is used as a lubricant
Correct Answer: (c)
The correct answer is (c): हीरा विद्युत का सुचालक है. Subject: Science & Technology | Sub-topic: Chemistry Note: This answer was determined through AI-based research. Verify against the official answer key when available.