In which of the following reaction, the hybridisation of the central atom changes from $sp^2$ to $sp^3$ ?
$N{H_3} + {H^ + } \to NH_4^ + $
$Al{F_3} + 3{F^ - } \to AlF_6^{3 - }$
$B{F_3} + {F^ - } \to BF_4^ - $
${H_2}O + {H^ + } \to {H_3}{O^ + }$
Give uses of $LiBH_4$ and $NaBH_4$.
During metallurgy of aluminium bauxite is dissolved in cryolite because
The chemical name of borax is
Boron cannot form which one of the following anions ?
Aluminium chloride in acidified aqueous solution forms an ion having geometry