Recall: ↑ bond order, ↑ bond energy, ↑ bond strength
Drawing the Lewis structures of each:
H3CCH3 : C-C bond order: 1
Order these compounds in order of increasing carbon-carbon bond strength.
a) H2CCH2 < H3CCH3 < HCCH
b) H3CCH3 < H2CCH2 < HCCH
c) HCCH < H2CCH2 < HC3CH3
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