NEET 2000 Chemistry question

2-butene shows geometrical isomerism due to :

(1)Restricted rotation about double bondCorrect
(2)Free rotation about double bond
(3)Free rotation about single bond
(4)Chiral carbon

Answer: (1)

Solution

A carbon-carbon double bond consists of a and a bond; rotation about it would break the bond, so rotation is restricted. As a result the groups on each carbon are locked on the same side (cis) or opposite sides (trans), and since each double-bond

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Question ID VK-088596