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What is mutarotation ?...

What is mutarotation ?

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It is the process involving the gradual change in the optical rotation of either optically active form of a carbohydrate to that of equilibrium mixture.
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An optically active drug has one chiral centre and only dextro rotatory isomer is effective. Moreover, it becomes ineffective when its optical activity is reduced to 35% of original. It was found that mutarotation of this drug was first order reaction with a rate constant of 1 xx 10^(-8) s^(-1) . Find the expiration time of the drug in years.

Explain, in neutral or basic aqueous solution, glycosides do not show mutarotation, but in acidic medium they show mutarotation.

Explain mutarotation. Give its mechanism in case of D-glucose.

A sugar exist in two isomeric form alpha-D & beta-D with specific rotation of 110^(@) and 30^(@) respectively. When alpha-D form of the suar is dissolved in water exhibits mutarotation till the equilibrium value of 90^(@) is attained. The equilibrium constant of mutarotation of beta-D form [Assuming only alpha and beta form in solution] is equal to:

The enthalpy changes of some process are given below alpha-D "glucose"_((s)) + H_(2)O rarr alpha -D- "glucose"_((aq)) Heat of dissolution =10.84kJ beta- D "glucose"_((s)) + H_(2)O rarr beta- D- "glucose"_((aq)) Heat of dissolution = 4.68kJ alpha-D "glucose"_((aq)) rarr beta - D- "glucose"_((aq) Heat of mutarotation =-1.16kJ The DeltaH^(0) "for " alpha - D "glucose"_((s)) rarr beta -D "glucose"_((s)) is

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Which of the following exhibit mutarotation?

Which one of the following does not exhibit the phenomenon of mutarotation ?

The phenomenon of mutarotation is shown by:

Glucose will show mutarotation when solvent is :