Which of the following are characteristics of ethene but not of ethane
A
Carbon is sp3 hybridised
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B
Carbon is sp2 hybridised
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C
Allowed rotation through C−C bond and axis perpendicular to it
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D
Forbidden rotation through C−C bond and axis perpendicular to it
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Solution
The correct options are A Carbon is sp2 hybridised D Forbidden rotation through C−C bond and axis perpendicular to it Since it contain pi bond thus it cannot rotate along C-C bond and axis perpendicular to it.