The order of catenation power is $Ge < Si < C$. What are the $C-C$,$Si-Si$,and $Ge-Ge$ bond energies (in $kJ/mol$) respectively?

The element that does $NOT$ show catenation is

The order of catenation property for $C, Si,$ and $Ge$ is $Ge < Si < C$. What will be the bond dissociation energy (in $kJ \ mol^{-1}$) for $C-C, Si-Si,$ and $Ge-Ge$ bonds respectively?

What is the hybridization of carbon atoms in fullerene?

$A$ cyclic skeleton of silicon and oxygen can be constructed by the silicate ion composition:

Gas $A$ is bubbled through slaked lime when a white precipitate is formed. On prolonged bubbling,the precipitate is dissolved. On heating the resultant solution,the white precipitate reappears with the evolution of gas $B$. The gases $A$ and $B$ respectively are