Hydrated $AlCl_3$ is used as :

Given below are two statements:
Statement $I$: Aluminium is more electropositive than thallium as the standard electrode potential value of $E^\circ_{Al^{3+}/Al}$ is negative and $E^\circ_{Tl^{3+}/Tl}$ is positive.
Statement $II$: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason, boron forms covalent compounds only and aluminium forms $Al^{3+}$ ion.

Aluminium $(III)$ chloride forms a dimer because

The correct statement$(s)$ about $B_2H_6$ is/are:

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$a$. Borax	$i$. $NaBO_2$
$b$. Kernite	$ii$. $Na_2B_4O_7 \cdot 4H_2O$
$c$. Orthoboric acid	$iii$. $H_3BO_3$
$d$. Borax bead	$iv$. $Na_2B_4O_7 \cdot 10H_2O$

Choose the correct answer from the options given below:

What is the molecular formula of borazole?