Boron has an exceptionally high melting point in the group 1 3 t h elements, because–

Boron has an exceptionally high melting point in the group 13th elements, because–
  1. boron has the smallest size in the group
  2. boron atoms are joined by Vander Waals force
  3. boron is covalent solid
  4. boron has higher ionisation energy

Solution

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

Asked in: JEE-TOPICTESTS-CHEMISTRY

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