Question

Boron has an exceptionally high melting point in the group $13^{th}$ elements, because-

• A. boron has the smallest size in the group
• B. boron atoms are joined by Vander Waals force
• C. boron is covalent solid
• D. boron has higher ionisation energy

Answer 1

Answer: (C)

Boron exists in giant covalent structure. Boron due to small size forms strong covalent bonds with the neighbouring atoms.