First slide

13th group or boron group

Question

Which one of the following is the correct statement ?

Moderate

A

$B_{2} H_{6} \cdot 2 {NH}_{3}$ is known as inorganic benzene.
B

Boric acid is a protonic acid.
C

Beryllium exhibits a coordination number of six.
D

Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase.

Solution

(1) B₃N₃H₆ is inorganic benzene.
(2) Boric acid is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion.
(3) ‘Be’ exhibits a Coordination no of 4 (max.)

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