Give the uses of silicones.

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{S}OCl_2 + H_2O \longrightarrow H_2SO_3 + HCl$

When lead nitrate is heated,it gives

What is aluminosilicate? Which ions are used to balance its electric charge?

The correct order of bond enthalpy $\left( kJ \, mol^{-1} \right)$ is :

Correct statements among $(i)$ to $(iv)$ regarding silicones are:
$(i)$ they are polymers with hydrophobic character
$(ii)$ they are biocompatible
$(iii)$ in general,they have high thermal stability and low dielectric strength
$(iv)$ usually they are resistant to oxidation and used as greases.