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Question

Which of the following can have meso isomers?

A
CH2(OH)CH(OH)CHO
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B
CH2(OH)CH(OH)CH(OH)CHO
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C
HOOCCH(OH)CH(OH)COOH
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D
CH2(OH)CH(OH)CH(OH)COOH
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Solution

The correct option is D HOOCCH(OH)CH(OH)COOH
A meso compound or meso isomer is a non-optically active member of a set of stereoisomers, at least two of which are optically active. This means that despite containing two or more stereogenic centers, the molecule is not chiral.

Option (c) is tartaric acid. It can exist in its Meso form.

62338_25809_ans_7bd167fca1d14778a1b9d49e9a7b57ab.png

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