p-Block Elements-I - Result Question 1-1
1. The $\mathrm{C}-\mathrm{C}$ bond length is maximum in
( 2019 Main, 12 April II)
(a) graphite
(b) $\mathrm{C}_{70}$
(c) $\mathrm{C}_{60}$
(d) diamond
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Answer:
Correct Answer: 1. (d)
Solution:
- The $\mathrm{C}-\mathrm{C}$ bond length is maximum in diamond having value $154$ 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 $141.5$ pm . In $\mathrm{C}_{60}, \mathrm{C}-\mathrm{C}$ distances between single and double bonds are $143.5$ pm and $138.3$ pm respectively.
BETA
