The C-C bond length is shortest in

  • Option 1)

    C2H6

  • Option 2)

    C2H4

  • Option 3)

    C2H2

  • Option 4)

    C2H5Cl

 

Answers (1)

As we learnt in

Bond Order -

Bond order is defined as one half the difference between the number of electrons present in the bonding and the antibonding orbitals.

- wherein

Bond \:Order=\frac{N_{b}-{N_{a}}}{2}

 

 

 

We know thet bond length  \propto \frac{1}{bond \:order}

bond order is highest at 3 with C2H2

\therefore  C-C bond length will be shortest.

 


Option 1)

C2H6

Option is incorrect

Option 2)

C2H4

Option is incorrect

Option 3)

C2H2

Option is correct

Option 4)

C2H5Cl

Option is incorrect

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