In the following reaction $2x + B_2H_6 \rightarrow [BH_2x_2]^+ [BH_4]^-$,$x$ is

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

When orthoboric acid $(H_3BO_3)$ is heated,the residue left is:

Explain the physical characteristics of group $13$ elements.

What is added to borax to obtain boric acid?

$A$ compound $X$,of boron reacts with $NH_3$ on heating to give another compound $Y$,which is called inorganic benzene. The compound $X$ can be prepared by treating $BF_3$ with lithium aluminium hydride. The compounds $X$ and $Y$ are represented by the formulas.