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-p-Block elements - I — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
The $C-C$ bond length is maximum in
  • A
    graphite
  • B
    $C_{70}$
  • ✓
    diamond
  • D
    $C_{60}$
✓

Answer

Correct option: C.
diamond
c
Since carbon in diamond is $sp^3$ hybridized and its $C -C$ bond order is $1$. In graphite and fullerene there is both $C -C$ and $C = C$ in conjugation, hence there is partial double bond character between carbon atoms

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