For a good quality cement,the ratio of silica to alumina is found to be

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:

If in a mineral $1000$ tetrahedral basic unit of silicates are arranged in a chain,then what will be the formula of the anion of that mineral?

Explain the oxidation states of group $14$ elements.

Polyphosphates are used as water softening agents because they .......

In atomic reactors,graphite is used as a