\textbf{219-} The average bond enthalpy between two atoms given for which type of bond, compared to other proposed bonds, is greater?
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(1) C and C in ethylene \hspace{1em} (2) O and O in $\text{O}_2$ \hspace{1em} (3) N and N in $\text{N}_2$ \hspace{1em} (4) C and C in cycloalkanes
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