The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

Identify the correct statement for $B _{2} H _{6}$ from those given below.

$(A)$ In $B _{2} H _{6}$, all $B – H$ bonds are equivalent.

$(B)$ In $B _{2} H _{6}$ there are four $3-$centre$-2-$electron bonds.

$(C)$ $B _{2} H _{6}$ is a Lewis acid.

$(D)$ $B _{2} H _{6}$ can be synthesized form both $BF _{3}$ and $NaBH _{4}$.

$(E)$ $B _{2} H _{6}$ is a planar molecule.

Choose the most appropriate answer from the options given below….. .

The tendency to form monovalent compounds among the Group $13$ elements is correctly exhibited in :

Aluminium has a great affinity for oxygen and its oxidation is an exothermic process. This fact is made use of in

Is boric acid a protic acid? Explain.