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Which of the following has the weakest carbon-carbon strength ?(a) C2H2 (b) C2H4 (c) C2H6 (d) all have the same bond strength

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C2H6 has weakest carbon- carbon strength.

Bond energy decreases with decreasing bond order. Hence C2H6 will have the lowest carbon–carbon bond order and the weakest carbon–carbon bond 

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Sumit Saini

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