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NEET UG CHEMISTRY MCQ: ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES AND TECHNIQUES

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The C−C\mathrm{C}-\mathrm{C} bond length of the following molecules is in the order.
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Correct option: B
C2H2<  C2H4<  C6H6<  C2H6{\mathrm{C}_2}{\mathrm{H}_2} < \mathrm{\;}{\mathrm{C}_2}{\mathrm{H}_4} < \mathrm{\;}{\mathrm{C}_6}{\mathrm{H}_6} < \mathrm{\;}{\mathrm{C}_2}{\mathrm{H}_6}
Option B (C2H2<C2H4<C6H6<C2H6{\mathrm{C}_2}{\mathrm{H}_2} < {\mathrm{C}_2}{\mathrm{H}_4} < {\mathrm{C}_6}{\mathrm{H}_6} < {\mathrm{C}_2}{\mathrm{H}_6}) is correct because bond length decreases with increasing bond order due to stronger attraction between the carbon atoms.

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