Hydrolysis of which of the following does not occur?

In the following reaction,assign the product of complete hydrolysis at $R.T.$ for the underlined atom:
$\underline{Si}O_2 + H_2O \longrightarrow $ No reaction

The option$(s)$ with only amphoteric oxides is(are)
$[A]$ $Cr_2O_3, BeO, SnO, SnO_2$
$[B]$ $Cr_2O_3, CrO, SnO, PbO$
$[C]$ $NO, B_2O_3, PbO, SnO_2$
$[D]$ $ZnO, Al_2O_3, PbO, PbO_2$

$PbO_2$ reacts with concentrated $HNO_3$. The gas evolved is:

The catenation tendency of $C$,$Si$ and $Ge$ is in the order $Ge < Si < C$. The bond energies (in $kJ \ mol^{-1}$) of $C-C$,$Si-Si$ and $Ge-Ge$ bonds,respectively,are:

Explain the following reactions:
$(a)$ Silicon is heated with methyl chloride at high temperature in the presence of copper.
$(b)$ Silicon dioxide is treated with hydrogen fluoride.
$(c)$ $CO$ is heated with $ZnO$.
$(d)$ Hydrated alumina is treated with aqueous $NaOH$ solution.