Question

Assertion : Among the carbon allotropes, diamond is an
insulator, whereas, graphite is a good conductor of
electricity.
Reason: Hybridization of carbon in diamond and graphite
are sp and sp, respectively.

(a) Both assertion and reason are correct, but the reason
is not the correct explanation for the assertion.
(b) Both assertion and reason are correct, and the reason
is the correct explanation for the assertion.
(c) Both assertion and reason are incorrect.
(d) Assertion is incorrect statement, but the reason is
correct.

JEE (Online 2016)​

Answer 1

Answer

(a) Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.

★Explanation★

Diamond is a bad conductor of electricity because of availability of free electrons while graphite is a good conductor of electricity due to fourth valence electron of each carbon which is free to move.

Answer 2

(a) Both assertion and reason are correct, but the reason

(a) Both assertion and reason are correct, but the reasonis not the correct explanation for the assertion.