Q. Choose the correct statement:
A) Both diamond and graphite are used as dry lubricants.
B) Diamond and graphite have two dimensional network
C) Diamond is covalent and graphite is ionic
D) Diamond is $sp^3$ hyridised and graphite is $sp^2$ hybridized.
Explanation
[Solution] In diamond each C is $sp^3$ hybridised (3D network); in graphite each C is $sp^2$ hybridised (layers). Only graphite is a lubricant and both are covalent. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.