A) \[{{C}_{2}}{{H}_{6}}\]
B) \[{{C}_{2}}{{H}_{2}}\]
C) \[{{C}_{6}}{{H}_{6}}\]
D) \[{{C}_{2}}{{H}_{4}}\]
Correct Answer: B
Solution :
Order of bond length \[C-C>C=C>C\equiv C\] So that minimum \[C-C\] bond length is in \[{{C}_{2}}{{H}_{5}}\].
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