Which of the following compound does not show the amphoteric behaviour
$Zn(OH)_2$
$BeO$
$Al_2O_3$
None of these
The species, having bond angles of $120^o $ is
The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is
Which match is not incorrect ?
$B{X_3} + N{H_3}\ \xrightarrow {R.T}\ B{X_3}.N{H_3} +$ Heat of adduct formation $\left( {\Delta H} \right)$ The numerical value of $\Delta H$ is found to be maximum for
Which does not show inert pair effect ?