CET Karnataka Medical CET - Karnataka Medical Solved Paper-2011

  • question_answer
    Increasing order of carbon-carbon bond length for the following is \[\underset{(A)}{\mathop{{{C}_{2}}{{H}_{4}}}}\,\] \[\underset{(B)}{\mathop{{{C}_{2}}{{H}_{2}}}}\,\] \[\underset{(C)}{\mathop{{{C}_{6}}{{H}_{6}}}}\,\] \[\underset{(D)}{\mathop{{{C}_{2}}{{H}_{6}}}}\,\]

    A)  \[C<B<A<D\]

    B)  \[B<C<A<D\]

    C)  \[D<C<A<B\]

    D)  \[B<A<C<D\]

    Correct Answer: D

    Solution :

    In \[{{C}_{2}}{{H}_{6}},\], carbon-carbon bond is single \[(1.54\overset{\text{o}}{\mathop{\text{A}}}\,)\]. In \[{{C}_{6}}{{H}_{6}}\], carbon-carbon bond is partially double \[(1.39\overset{\text{o}}{\mathop{\text{A}}}\,)\] In \[{{C}_{2}}{{H}_{4}}\], carbon-carbon bond is double \[(1.34\overset{\text{o}}{\mathop{\text{A}}}\,)\] In \[{{C}_{2}}{{H}_{2}}\], carbon-carbon bond is triple \[(1.10\overset{\text{o}}{\mathop{\text{A}}}\,)\]


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