Which of the following statements is not true about meso compounds?
A
They have an internal mirror plane.
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B
They are optically active.
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C
They are optically inactive.
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D
They are achiral.
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Solution
The correct option is B They are optically active.
Meso compounds are optically inactive due to internal compensation, caused because of equal and opposite rotation of plane polarised light by two adjacent chiral carbons in the molecule.