Silicon is an important constituent of which of the following?

Which of the following oxides is acidic in nature?

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 basic structural unit of silicates is

What is the chief constituent of Pyrex glass?

Which of the following is the correct statement for red lead?