Borax dissolves in water and forms a product of boron $(X)$. Identify the compound $X$.

Relative stability orders of $+1$ and $+3$ oxidation states of $Ga, In, Tl$ are respectively:

$BCl_3$ and $AlCl_3$ exist in $:-$

Which metal is protected by a layer of its own oxide?

Borax is converted into crystalline boron by the following steps :
$Borax$ $\xrightarrow{HCl} (X)$ $\xrightarrow{\Delta} B_2O_3$ $\xrightarrow{\Delta, Y} B$
Identify $X$ and $Y$ respectively.

Which of the following statements is not true?