Q.

The change in the optical rotation of freshly prepared solution of glucose is known as

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a

racemisation

b

tautomerism

c

mutarotation

d

specific rotation

answer is D.

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Detailed Solution

By definition mutarotation is the change in the optical rotation with time that occurs by epimerization (that is the change in the equilibrium between two epimers, when the corresponding stereocenters interconvert). Cyclic sugars show mutarotation as α and β anomeric forms interconvert.  

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