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Question

(+)-Tartaric acid and meso-tartaric acids are :

A
enantiomers
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B
diastereomers
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C
geometric isomers
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D
none of these
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Solution

The correct option is B diastereomers

Tartric acid contains two asymmetric centers, but two of the "isomers" are equivalent and together are called meso which is not optically active, while the remaining two isomers are D- and L- mirror images, i.e., enantiomers. The meso form is a diastereomer of the other forms.


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