Which one of the following elements is unable to form $MF_{6}^{3-}$ ion?
$Ga$
$Al$
$B$
$In$
If $B-Cl$ bond has a dipole moment, explain why $BCl_3$, molecule has zero dipole moment.
$A{l_2}{O_3}$ formation involves evolution of a large quantity of heat, which makes its use in
In some of the reactions thallium resembles aluminium, whereas in others it resembles with group $-I$ metals. Support this statement by giving some evidences.
$Al$ having double conductivity as compared to which metal ?
The hardest substance amongst the following is