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Q.

List- 1 List-2
Compound C-C bond length
A) Benezene 1) $1.42 A^{0}$
B) Acetylene 2) $1.54 A^{0}$
C) Graphite 3) $3.35 A^{0}$
D) Diamond 4) $1.20 A^{0}$
5) $1.39 A^{0}$
The correct match is

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a

A:1;B:4;C:2;D:3

b

A:4;B:5;C:1;D:2

c

A:2;B:3;C:4;D:5

d

A:5;B:4;C:1;D:2

answer is C.

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Detailed Solution

The carbon–carbon (C–C) bond length in diamond is 154 pm or we can say 1.54 A⁰.In graphite the C-C bond length is 154pm and C=C bond length is 134 pm. But in benzene all C-C bond lengths are equal to 139 pm due to resonance. The carbon-carbon triple bond or multiple bond in acetylene is the shortest (120 pm) and the strongest. The carbon - carbon bond length in graphite is 142 pm or 1.42 A⁰.

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