Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Question Explanation:

This question asks which given compound is optically active, i.e., capable of rotating plane-polarized

light due to the presence of chirality.

Concept:

This question is based on Optical Activity, Chirality, Stereocentres, Plane of Symmetry, Meso

Compounds

Solution:

Option (2):

The molecule has two stereocentres and no plane of symmetry. The arrangement of substituents is such

that the molecule is chiral, hence optically active.

Option (3):

This is an alkene showing E/Z isomerism, not chirality → optically inactive.

Option (1) and Option (4):

Although stereocentres are present, the molecules have an internal plane of symmetry, so they are meso

compound → optically inactive.

Final Answer: Option (2)