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The carbon –carbon bond length in the compounds
follows the order 
  • a)
    III <  II < I < IV
  • b)
    IV < I < II < III
  • c)
    I < II < III < IV
  • d)
    I < IV < III < II 
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The carbon –carbon bond length in the compoundsfollows the order...
Bond length is inversely proportional to the number of bonds.
and in II double bond character is shared by more no. of carbon so it is more stable.
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Community Answer
The carbon –carbon bond length in the compoundsfollows the order...
As the bond strength increases, the bond length decreases. As we know, bond strength is inthe order of triple bond>double bond>single bond. The C-C bond length of benzene is intermediate between that of double bond and single bond due to resonance. Therefore in benzene, each C-C bind has a partial double bond character. Hence the bond is stronger than single bond and weaker than double bond
Hence here the answer comes B option
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The carbon –carbon bond length in the compoundsfollows the ordera)III < II < I < IVb)IV < I < II < IIIc)I < II < III < IVd)I < IV < III < IICorrect answer is option 'B'. Can you explain this answer?
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