I. Both CCl4 and SiCl4 undergo hydrolysis is incorrect. CCl4 does not undergo hydrolysis due to absence of vacant d-orbitals whereas SiCl4 does undergo hydrolysis. II. Ge4 is more stable than GeX2 is a correct statement. The stability of +2 oxidation state increases down the group due to inert pair effect. Also electrons configuration of Ge+4 is stable electrons configuration 1s22s22p63s23p63d10 Hence, GeX4 is more stable than Ge2. III. PbX4 is less stable than PbX2. The stability of +2 oxidation state of group 14 clements increases down the group due to inert pair effect. ∴PbX4 is less stable than PbX2. Hence, the statement is correct. IV. Stability of dihalides decreases down the group. The statement is incorrect. The stability of lower oxidation state (+2) i.e. dihalides increases down the group due to inert pair effect. Only (II) and (III) are correct.
