A) a molecule containing two or more chiral centres is always optically active
B) a molecule containing just one chiral centre is always optically active
C) a molecule possessing alternating axis of symmetry is optically active
D) an optically active molecule should have at least one chiral centre
Correct Answer: B
Solution :
For a molecule to be chiral, there should be (i) Alternate axis of symmetry (ii) Plane of symmetry (iii) Centre of symmetry If there are more than one chiral centre in a compound, then it can have only of the above three symmetric elements, so it can become optically inactive.
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