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The beta (beta) and alpha (alpha) glucos...

The beta (`beta`) and alpha (`alpha`) glucose have different specific rotation. When either is dissolved in water, their specific rotation changed to reach a certain fixed value. This is called :-

A

Epimerisation

B

Racemisation

C

Anomerisation

D

Mutarotation

Text Solution

Verified by Experts

The correct Answer is:
D
The `beta` and `alpha`-glucose have different rotation. When either is dissolved in water, their rotation changes until the same fixed values results. This called mutarotation.
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D(+) Glucose has melting point 146^(@)C and specific rotation [alpha]_(C)6(25) is + 122^(@)C . Another D(+) Glucose has melting 150^(@) C and specific rotation [alpha]_(D)^(25) is + 18.7^(@)C . The two form have significantly different optical rotation but when an aqueous solution of either form is allowed to stand, it rotation changes. The specific rotation of one form decrease and rotation of other increases until both solution show the same value +52.7^(@) . The change in rotation towards an equilibrium value is called mutarotation. Mutarotation is characteristic feature of

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