Which of the following is responsible for cleansing action of Borax

The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite $(N{a_3}Al{F_6})$ is

The most acidic of the following compounds is

Write balanced equations for : 

$(i)\,B{F_3} + LiH \to $

$(ii)\,{B_2}{H_6} + {H_2}O \to $

$(iii)\,NaH + {B_2}{H_6} \to $

$(iv)\,{H_3}B{O_3}\xrightarrow{\Delta }$

$(v)\,Al + NaOH \to $

$(vi)\,{B_2}{H_6} + N{H_3} \to $

Choose the Incorrect statement/ reaction

Draw structure of $Al_2Cl_6$ and give uses of $AlCl_3$.