Question

Which one of the following is the correct statement?

• A. Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase
• B. $B{}_2{H}_6.2N{H}_3$ is known as ` inorganic benzene
• C. Boric acid is a protonic acid
• D. Beryllium exhibits coordination number of six

Answer 1

The correct option is A Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

Inorganic benzene is $B_3{N}_3{H}_6$,
Boric acid ($B(OH{)}_3$) is a Lewis acid (a compound or ionic species which can accept an electron pair from a donor compound) and beryllium exhibits co-ordination number of 4 only. $BeC{l}_2$ and $AlC{l}_3$ both exhibit bridged structures in the solid state
Hence option A is correct.