When lead nitrate is heated,it gives

Which of the following elements produces a gaseous oxide upon burning at room temperature?

Which of the following tetrahalides does not exist?

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

On controlled hydrolysis and condensation,$R_3SiCl$ yields

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: