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Question

Geometrical isomerism is exhibited by:

A
2-chlorobut-2-ene
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B
but-2-ene
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C
3-methylpent-2-ene
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D
2-methyl but-2-ene
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Solution

The correct options are
A 2-chlorobut-2-ene
B but-2-ene
C 3-methylpent-2-ene
The main conditions for exhibiting geometrical isomerism are
(i) the presence of a double bond.
(ii) presence of different groups on double-bonded C-atom.
(iii) presence of at least one similar group on adjacent double-bonded carbon atoms.

2chlorobut2ene,but2ene,3methylpent2ene show geometrical isomerism. but 2methyl but2ene does not show geometrical isomerism because the same(−CH3) group is present on double-bonded carbon).


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