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


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