Sulphur is most soluble in

The correct statements with respect to halides of group $14$ elements are:
$I$. Both $CCl_4$ and $SiCl_4$ undergo hydrolysis
$II$. $GeX_4$ is more stable than $GeX_2$
$III$. $PbX_4$ is less stable than $PbX_2$
$IV$. Stability of dihalides decreases down the group.

Which of the following is an amphoteric oxide?

Silicon has a strong tendency to form polymers like silicones. The chain length of silicone polymers can be controlled by adding:

Which of the following has the lowest melting point?

Davy and Faraday proved that