The shape of $H_3O^{+}$ ion is

Although the geometries of $NH_{3}$ and $H_{2}O$ molecules are based on a distorted tetrahedral arrangement,the bond angle in water is less than that of ammonia. Discuss.

The bond angles in methane $(I)$,ammonia $(II)$,and trimethylamine $(III)$ increase in the order:

Group the following as linear and non-linear molecules: $H_2O$,$HOCl$,$BeCl_2$,$Cl_2O$.

The correct order of bond angles is

The molecule exhibiting the maximum number of non-bonding electron pairs $(l.p.)$ around the central atom is