Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Question Explanation: Counting compounds that can exhibit geometrical isomerism.

Concept: Geometrical Isomerism in Alkenes, Oximes, and Cycloalkanes.

Solution: Geometrical isomerism occurs when there is restricted rotation and two different groups are attached to each atom of the double bond or ring.

(i) Benzaldoxime: Exhibits syn and anti isomers due to different groups on C and N (with a lone pair).

(ii) Cyclohexane: Unsubstituted monocyclic rings do not show geometrical isomerism.

(iii) 2,3-Dimethyl-2-butene: Both carbons have identical groups (two methyl), so no isomerism.

(iv) 1,2-Dimethylcyclopropane: Shows cis and trans isomers due to substituted ring carbons.

Final Answer: 2