Which of the following is used in the estimation of carbon monoxide?

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:

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

What do you understand by $(a)$ inert pair effect,$(b)$ allotropy,and $(c)$ catenation?

Which of the following statements is not correct?

Litharge $(PbO)$ is $NOT$ used in which of the following?