Borax is used as a cleansing agent because on dissolving in water it gives:

$AlCl_3$ on hydrolysis gives:

$A$ group $13$ element '$X$' reacts with chlorine gas to produce a compound $XCl_3$. $XCl_3$ is electron deficient and easily reacts with $NH_3$ to form $Cl_3X \leftarrow NH_3$ adduct,however,$XCl_3$ does not dimerize. $X$ is

The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is :-

What is $Z$ in the following reactions?
$BCl_3 + H_2 \xrightarrow[450^{\circ}C]{Cu-Al} X + HCl$
$X \xrightarrow{\text{methylation}} Z$

Hydrated $AlCl_3$ is used as :