Optical rotation of a racemic mixture is always :

positive

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negative

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zero

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can not be predicted

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Solution

The correct option is C zero
Racemic mixture is one that has equal amounts of left- and right-handed enantiomers of a chiral molecule. So rotation of one isomer cancels that of other.
Therefore, racemic mixture is optically inactive and its rotation is always zero.

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Similar questions

STATEMENT-1 : Racemic mixture has a net rotation of zero.

STATEMENT-2 : Racemic mixture contains optically inactive isomers.

A

B

C

A \to B + C

time (min)	0	10	$\infty$
optical rotation $(^{\circ})$	$15^{\circ}$	$5^{\circ}$	$- 5^{\circ}$

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