The B–X distance is shorter than what is theoretically expected in BX₃molecules. Why?

Complete the reaction:

Complete the reaction

Present a comparative account of the structures of chlorides of boron and aluminium.

Why boron compounds such as BF₃ are called electron deficient compounds?

Complete the reaction:
    

An aqueous solution of borax is 

• neutral 

• amphoteric

• basic

• acidic

28.

Boric acid is polymeric due to

• its acidic nature

• the presence of hydrogen bonds

• its monobasic nature

• its geometry

The type of hybridisation of boron is diborane is

• sp

• sp²
• sp³
• dsp²

Name the purest form of carbon.