question_answer

In diamond crystal each carbon atom is linked with carbon atoms. The number of carbon atoms linked is:

A)  2                            

B)         4                            

C)  3                            

D)         1

Correct Answer: B

Solution :

In diamond each carbon atom is \[s{{p}^{3}}\] hybridized and is linked tetrahedrally to four other carbon atoms, with \[C-C\] bond length of \[1.54\overset{\text{o}}{\mathop{\text{A}}}\,\] and bond angle \[{{109}^{o}}28\]. This result in three dimensional network of strong covalent bond which make diamond extremely hard with very high melting point.