$H_3BO_3$ $\xrightarrow{{{T_1}}}X\xrightarrow{{{T_2}}}Y\xrightarrow{{red\,hot}}$ $B_2O_3$

if $T_1 < T_2$ then $X$ and $Y$ respectively are

The weakest Lewis acid is

The correct statements among $I$ to $III$ regarding group $13$ element oxides are,

$I$. Boron trioxide is acidic

$II$. Oxides of aluminium and gallium are amphoteric

$III$. Oxides of indium and thallium are basic

Taking stability as the factor, which one of the following represents correct relationship?

Draw the structures of $BCl_3. NH_3$ and $AlCl_3$ (dimer).

The compound($s$) which react($s$) with $NH _3$ to give boron nitride ($BN$) is(are)

$(A)$ $B$ $(B)$ $B _2 H _6$ $(C)$ $B _2 O _3$ $(D)$ $HBF _4$