Which of the following organosilicon compounds on hydrolysis will give a three-dimensional silicone?

In the following reaction,assign the state for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{S}F_4 + H_2O \longrightarrow H_2SO_3 + HF$

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:

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 are respectively:

Identify the incorrect statement about silica $(SiO_2)$.

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