Question

Which one of the following compounds will not show geometrical isomerism?

• A. prop-2-enoic acid
• B. 2-butene
• C. 2-methyl-2-butenoic acid
• D. 3- methyl-2-pentenoic acid

Answer 1

Answer: (A)

prop-2-enoic acid

Answer 2

Prop-$2$-enoic acid will not show geometrical isomerism. Geometrical isomers occur where we have restricted rotation somewhere in a molecule, between carbon atoms like - but-$2$-ene.

Prop-$2$-eneonic acid does not show geometrically isomerism.