Which of the following is/are ionic in nature?
$(i)$ $GeF_4$ $(ii)$ $SnF_4$ $(iii)$ $PbF_4$

It is observed that $Pb^{2+}$ is more stable than $Pb^{4+}$, while $Sn^{2+}$ is less stable than $Sn^{4+}$. Consider the following reactions:
$PbO_{2} + Pb \rightarrow 2PbO; \Delta_{r}G^{\circ} (1)$
$SnO_{2} + Sn \rightarrow 2SnO; \Delta_{r}G^{\circ} (2)$
Identify the correct set from the following.

Which of the following statements are correct?
$I)$ $SnF_4$ is ionic in nature.
$II)$ Stability of dihalides of group $14$ elements increases down the group.
$III)$ $GeCl_2$ is more stable than $GeCl_4$.

Which of the following is kept in water?

Which of the following compounds forms silicones on hydrolysis?

The formula of $3$ membered discrete chain silicate is