Number of oxygen atoms present in the chemical formula of fuming sulphuric acid is . . . . .

The products formed when gaseous $HCl$ is passed into an aqueous $Na_2SO_3$ solution are:

Select the member$(s)$ of group $14$ that $(i)$ forms the most acidic dioxide,$(ii)$ is commonly found in $+2$ oxidation state,$(iii)$ used as semiconductor.

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{P}OCl_3 + H_2O \longrightarrow H_3PO_4 + HCl$

$A$ thin layer of aluminum deposited on glass acts as a good mirror because ...............

Discuss the preparation and properties of silicones.