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(B) molecule exhibits optical isomerism if it contains a chiral carbon atom,which is a carbon atom bonded to four different groups.$A$. Glycolic acid

Vedclass · Accepted Answer

Lactic acid: $CH_3-CH(OH)-COOH$

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(B) molecule exhibits optical isomerism if it contains a chiral carbon atom,which is a carbon atom bonded to four different groups.$A$. Glycolic acid $(HO-CH_2-COOH)$: The central carbon is bonded to two identical hydrogen atoms. It is achiral.$B$. Lactic acid $(CH_3-CH(OH)-COOH)$: The central carbon is bonded to four different groups: $-H$,$-OH$,$-CH_3$,and $-COOH$. It is chiral and shows optical isomerism.$C$. Isobutyric acid $((CH_3)_2CH-COOH)$: The central carbon is bonded to two identical methyl groups. It is achiral.$D$. $2-$chloro$-2-$methylpropanoic acid $(CH_3-C(Cl)(CH_3)-COOH)$: The central carbon is bonded to two identical methyl groups. It is achiral.Therefore,lactic acid is the correct answer.

Which one of the following will show optical isomerism?

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