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(A) The bond length between carbon atoms depends on the hybridization of the carbon atoms involved.$1$. In $CH_3-CH_3$ (ethane), both carbons are $sp^

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$CH_3-CH_3$

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(A) The bond length between carbon atoms depends on the hybridization of the carbon atoms involved.$1$. In $CH_3-CH_3$ (ethane), both carbons are $sp^3$ hybridized. The $C-C$ bond is a single bond with a bond length of approximately $154 \ pm$.$2$. In $CH_2=CH_2$ (ethene), carbons are $sp^2$ hybridized. The $C=C$ bond length is $134 \ pm$.$3$. In $CH\equiv CH$ (ethyne), carbons are $sp$ hybridized. The $C\equiv C$ bond length is $120 \ pm$.$4$. In $CH_2=C=CH_2$ (allene), the central carbon is $sp$ hybridized and terminal carbons are $sp^2$ hybridized. The $C-C$ bond length is approximately $131 \ pm$.Comparing these, the $C-C$ single bond in ethane $(sp^3-sp^3)$ has the maximum bond length.

$C-C$ bond length is maximum in

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