• question_answer Which of the following hydrocarbon has the least carbon-carbon bond length? A) ${{C}_{2}}{{H}_{2}}$                 B) ${{C}_{6}}{{H}_{6}}$     C)   ${{C}_{2}}{{H}_{4}}$     D)   ${{C}_{2}}{{H}_{6}}$

Correct Answer: A

Solution :

$C-C$bond length in ${{C}_{2}}{{H}_{2}}-1.20\,\overset{o}{\mathop{A}}\,$ ${{C}_{2}}{{H}_{4}}-1.34\overset{o}{\mathop{A}}\,$ ${{C}_{6}}{{H}_{6}}-1.39\,\overset{o}{\mathop{A}}\,$ ${{C}_{2}}{{H}_{6}}-1.54\,\overset{o}{\mathop{A}}\,$ Hence, the correct option is (a).

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