Question

The catenation tendency of $C,Si$ and $Ge$ is in the order $Ge<Si<C$. The bond energies (in $kJmo{l}^{-1}$) of $C-C,Si-Si$ and $Ge-Ge$ bonds, respectively are:

• A. $348,167,180$
• B. $348,180,167$
• C. $167,180,348$
• D. $180,167,348$

Answer 1

The correct option is B $348,180,167$

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 are $348,180,167$ respectively.
$Ge$ has lowest bond energy, hence lowest catenation tendency.
$C$ has highest bond energy, hence highest catenation tendency.