MCQ
Number of optical isomers of lactic acid are
- A$1$
- ✓$2$
- C$3$
- D$4$
✓
Answer
Correct option: B.
$2$
b
(b) $C{H_3} - \mathop {\mathop {\mathop {\mathop {{C^*}}\limits_{|\,\,\,\,} }\limits_{OH} }\limits^{|\,\,\,\,} }\limits^{H\,\,} - COOH$
(b) $C{H_3} - \mathop {\mathop {\mathop {\mathop {{C^*}}\limits_{|\,\,\,\,} }\limits_{OH} }\limits^{|\,\,\,\,} }\limits^{H\,\,} - COOH$
Only one chiral centre. Hence two optical isomers are possible.
No. of optical isomer = ${2^n}$ (where n = no. of chiral carbon) = ${2^1}$ $= 2.$
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