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Change in optical rotation of sucrose so...

Change in optical rotation of sucrose solution due to hydrolysis is called
(A) Specific rotation
(B) Inversion
(C) Rotatory motion
(D) 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

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. What percentage of beta -D-(+) glucopyrnsone found at equillibrium in the aqueous solution?