Question

The geometrical isomerism is shown by

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

Conditions for geometrical isomers:
1) Free rotation must be restricted.
2) Both the terminals must be attached with different groups.
3) Terminals must not be in perpendicular planes.

a has two same groups attached to the one of the terminal carbon of the double bond so it can't show geometrical isomerism

b has two same groups attached to the one of the terminal carbon of the double bond so it can't show geometrical isomerism
c has two same groups attached to the one of the terminal carbon of the double bond so it can't show geometrical isomerism

d has two different groups (H and Cl) attached to the terminal carbon of the both double bond so it can show geometrical isomerism
hence correct option is d.