Question

Which one of the following statements is false?

• A. R and S configurations correspond to the enantiomers of an optically active compound
• B. The process of converting an optically active compound into a racemate is called racemization
• C. A molecule containing a plane of symmetry can be optically active
• D. Optical isomers that are not enantiomers are called diastereoisomers
• E. All chiral objects are asymmetric

Answer 1

Answer: (C)

$R-S$ - configuration is related to the enantiomers, which are optically active. ($\therefore $ true)

(b) The mixing of two optically-active compounds $(d$ and $l$ -type) in equimolar quantity is called racemisation ($\therefore $ true)

(c) A molecule containing plane of symmetry does not show optical-activity.

Hence, the given statement is false.

(d) Optical isomers that are not enantiomers are called diastereoisomers (is true).

(e) All chiral objects are asymmetric (true).