Diamond is hard because
A. All the four valence electrons are bonded to each carbon atom by covalent bonds
B. It is a giant molecule
C. It is made up of carbon atoms.
D. It cannot be burnt.
A. All the four valence electrons are bonded to each carbon atom by covalent bonds
B. It is a giant molecule
C. It is made up of carbon atoms.
D. It cannot be burnt.
Correct Answer – A
In diamond, each carbon atom is in `sp^(3)` hybridized state and linked to four other carbon atoms tetrahedrally by covalent bonds. As the atoms are held firmly by strong covalent bonds. So diamond is hardest substance.