p-Block Elements-I 2 Question 1
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1. The $\mathrm{C}-\mathrm{C}$ bond length is maximum in (2019 Main, $\mathbf{1 2}$ April II)
======= ####1. The $\mathrm{C}-\mathrm{C}$ bond length is maximum in (2019 Main, $\mathbf{1 2}$ April II)
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) graphite
(c) $\mathrm{C}_{60}$
(b) $\mathrm{C}_{70}$
(d) diamond
Show Answer
Solution:
- The $\mathrm{C}-\mathrm{C}$ bond length is maximum in diamond having value $154 \mathrm{pm}$. Here, each carbon atom undergoes $s p^{3}$ hybridisation and linked to four other carbon atoms by using hybridised orbitals in tetrahedral fashion. It has a rigid three-dimensional network of carbon atoms.
$\mathrm{C}-\mathrm{C}$ bond length within the layers of graphite is $141.5 \mathrm{pm}$. In $\mathrm{C}_{60}, \mathrm{C}-\mathrm{C}$ distances between single and double bonds are 143.5 $\mathrm{pm}$ and $138.3 \mathrm{pm}$ respectively.
