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Question

C60 contains

A
20 pentagons and 12 hexagons
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B
12 pentagons and 20 hexagons
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C
30 pentagons and 30 hexagons
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D
24 pentagons and 36 hexagons
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Solution

The correct option is B 12 pentagons and 20 hexagons

The general name fullerene refers to the family of spheroidal carbon cage molecules. The shape of C60 resembles that of a soccer ball.

(i)There are 12 five-membered rings.

(ii)There are 20 six-membered rings.

(iii)Six-membered rings are fused to other six-membered as well as five-membered rings.

(iv)Five-membered rings are fused to only six-membered rings.

(v)There are both single and double bonds.

All the carbon atoms are equivalent and undergo sp2 hybridisation. There are both single and double bonds, with C - C distances of 145.3 and 138.5 pm, respectively.


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