The substance as hard as hard as diamond is

The form of BN which is hard as diamond is

Why is diamond hard ?

The hardness of diamond is due to

Consider the following statements : 1. Diamond is hard and graphite is soft. 2. Diamond is soft and graphite is hard. 3. Diamond is a bad conductor but graphite is a good conductor . 4. Diamond is a good conductor but graphite is a bad conductor. Which of the statements given above is/are correct ?

Assertion :- (A) Graphite is good conductor of electricity however diamond belongs to the category of insulators . Rason (R ) Grapite is soft in anture on the hand diamond is very hard and brittle.

Assertion :- (A) Graphite is good conductor of electricity however diamond belongs to the category of insulators . Rason (R ) Grapite is soft in anture on the hand diamond is very hard and brittle.

Assertion :- (A) Graphite is good conductor of electricity however diamond belongs to the category of insulators . Rason (R ) Grapite is soft in anture on the hand diamond is very hard and brittle.