Rotation around the bond (between the underli | vedclass

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(D) Rotation is restricted around double and triple bonds due to the presence of $\pi$ bonds. In $C_2H_4$ $(CH_2=CH_2)$,there is a $C=C$ double bond.

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$C_2H_6$ (single bond between carbons)

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(D) Rotation is restricted around double and triple bonds due to the presence of $\pi$ bonds. In $C_2H_4$ $(CH_2=CH_2)$,there is a $C=C$ double bond. In $C_2H_2$ $(CH \equiv CH)$,there is a $C \equiv C$ triple bond. In $H_2O_2$ $(H-O-O-H)$,although there is a single bond,the lone pairs on oxygen atoms cause repulsion,leading to a restricted rotation in its non-planar 'open book' structure. In $C_2H_6$ $(CH_3-CH_3)$,there is a $C-C$ single bond,which allows free rotation around the bond axis.

Rotation around the bond (between the underlined atoms) is not restricted in

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