The chloride that $can \ not$ get hydrolysed is

$SiO_{2}$ is attacked by which of the following?

Nitrolim is

In the following reaction,assign the correct category for the underlined atom in the product of complete hydrolysis at $R.T.$:
$H_3\underset{-}{P}O_5 + H_2O \longrightarrow H_3PO_4 + H_2O_2$

What is the product obtained from the hydrolysis of $(Me)_2SiCl_2$?

Litharge $(PbO)$ is $NOT$ used in which of the following?