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MCQ
What is the correct order of bond lengths in C2H2, C2H4, and C2H6?
Chemistry
A C2H2 < C2H4 < C2H6
B C2H6 < C2H4 < C2H2
C C2H4 < C2H2 < C2H6
D C2H2 = C2H4 = C2H6
Explanation

Bond length increases as bond order decreases: C-C triple bond (C2H2) < C=C double bond (C2H4) < C-C single bond (C2H6).

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