Question

Which one of the following is/are the incorrect statement(s)?

• A. Boric acid is a protonic acid
• B. Beryllium exhibits coordination number of six
• C. Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase
• D. $B_2{H}_6.2N{H}_3$ is known as ‘inorganic benzene’

Answer 1

Answer: (A), (B), (D)

$B_2{H}_6.2N{H}_3$ is known as ‘inorganic benzene’

(A) Boric acid is not a protonic acid because it is accept from water and water lose $H^{+}$.

$B{\left(\mathrm{OH}\right)}_3+H_{2}O\to [B{\left(\mathrm{OH}\right)}_4{]}^{-}+H^{+}$
(Lewis acid)

(B) Beryllium exhibits a coordination number of four only because it has electronic configuration $1s^{2}2s^2$.

(C) $BeC{l}_2$ and $AlC{l}_3$ both having bridged structure in a solid phase.



(D) $B_3{N}_3{H}_6$ is known as inorganic benzene, not $B_2{H}_6.2N{H}_3$.