Question

Consider the following statements.
I. Meso form is optically inactive due to the absence of dissymmetry in the molecule.
II. Compound will be optically active if it is a dissymmetric molecule.
III. Geometrical isomers are stereoisomers.
IV. Physical properties of stereoisomers are different.
Select the correct answer(s).

• A. Only IV
• B. I, II, III and IV
• C. I, II and IV
• D. II, III and IV

Answer 1

Answer: (B)

I, II, III and IV

i) When the molecule is symmetric then it have any kind of symmetry, and so the compund will be optically inactive due to symmetry.
ii) Optically active compounds have chiral centres and absence of any kind of symmetry.
iii) Geometrical isomers is a kind of stereoisomer in which the spatial configuration is different.
iv) Stereoisomers have different physical and chemical properties.

Option B is correct.