1.

Assertion (A): Diamond is a rigid substance and it is very hard. Reason (R ): In diamond each carbon atom is bonded to three other carbon atoms in the same place giving hexagonal layers held together by weak vander waals forces.

Answer»

Both (A) and (R ) are correct
(A) is correct but (R ) does not explain (A)
Both (A) and (R ) are WRONG
(A) is wrong but (R ) is correct

Answer :B


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