The correct statement regarding ethane conformation is:
- ARotation around carbon-carbon bond in ethane molecule is not possible,because ethane molecule contains a pi $(\pi)$ bond between the carbon and carbon and ethane has very low melting point.
- BRotation around carbon-carbon bond in ethane molecule is not possible,because ethane molecule contains both sigma $(\sigma)$ bond,and pi $(\pi)$ bond between the carbon and carbon.
- CRotation around carbon-carbon bond in ethane molecule is possible because of cylindrical symmetry of sigma $(\sigma)$ bond between carbon-carbon atoms.
- DRotation around carbon-carbon bond in ethane molecule is not possible,because ethane molecule contains both sigma $(\sigma)$ bond and pi $(\pi)$ bond between the carbon and carbon and ethane has very high boiling point.
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