$N{a_2}{B_4}{O_7}.10{H_2}O \xrightarrow{\Delta } X + NaB{O_2} + {H_2}O$
$X + C{r_2}{O_3}\xrightarrow{\Delta }Y$ (Green coloured)
$X$ and $Y$ are
$Na_3BO_3, Cr(BO_2)_3$
$Na_2B_4O_7, Cr(BO_2)_3$
$B_2O_3, Cr(BO_2)_3$
$B_2O_3, CrBO_3$
The structure of diborane $({B_2}{H_6})$ contains
Boron form covalent compound due to
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 $
In the electrolytic extraction of aluminium, cryolite is used
Which of the following compounds is formed by addition of mineral acid to an aqueous solution of borax ?