Question

The $d$ and $l$ enantiomers of an optically active compound differ in

• A. their boiling and melting point
• B. their rotation of plane polarized light
• C. their solubility
• D. their refractive index

Answer 1

Answer: (B)

their rotation of plane polarized light

Answer 2

The $d$ and $Z$-enantiomers of an optically active compound have same physical properties like boiling point, melting point, solubility, refractive index etc, but they differ in their behaviour towards plane polarised light. The d-enantiomer rotates the plane of polarized light towards right hand side while $l-$ enantiomer rotates it towards left hand side.