Question

Geometrical isomerism is not shown by

• A.
• B.
• C.
• D. None of the above

Answer 1

The correct option is C

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.

Since structure c has same terminal group(H) thus it will not show geometrical isomerism.
structure a and b has restricted rotation as well as different groups at the terminal carbon so it will show geometrical isomerism.
Hence, the correct answer is option (c).