The least stable hydride is:

Mention the uses of pure forms of germanium and silicon.

Which one of the following is a good conductor of electricity?

Silicon chloroform is prepared by

$SiCl_4$ on hydrolysis forms '$X$' and $HCl$. Compound '$X$' loses water at $1000^{\circ} C$ and gives '$Y$'. Compounds '$X$' and '$Y$' respectively are:

Which of the following is the most stable?