AP EAPCET 05-Jul-2022 Shift 2 Paper

I. Both $\mathrm{CCl}_4$ and $\mathrm{SiCl}_4$ undergo hydrolysis is incorrect. $\mathrm{CCl}_4$ does not undergo hydrolysis due to absence of vacant $d$-orbitals whereas $\mathrm{SiCl}_4$ does undergo hydrolysis.II. $\mathrm{Ge}_4$ is more stable than $\mathrm{GeX}_2$ is a correct statement. The stability of $+2$ oxidation state increases down the group due to inert pair effect. Also electrons configuration of $\mathrm{Ge}^{+4}$ is stable electrons configuration $1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^{10}$Hence, $\mathrm{Ge} X_4$ is more stable than $\mathrm{Ge}_2$.III. $\mathrm{PbX}_4$ is less stable than $\mathrm{Pb} X_2$. The stability of $+2$ oxidation state of group 14 clements increases down the group due to inert pair effect.$\therefore \mathrm{Pb} X_4$ is less stable than $\mathrm{Pb} X_2$. 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.