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Question

For ‘invert sugar’, the correct statement(s) is/are:
(Given: Specific rotations of (+)-sucrose, (+)-maltose, L-(–)-glucose and L-(+)-fructose in aqueous solution
are +66o, +140o, 52o and +92o respectively)

A
Specific rotation of invert sugar is 20o
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B
Specific rotation of invert sugar is +20o
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C
‘Invert sugar’ is an equimolar mixture of D-(+)-glucose and D-(–)-fructose
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D
‘Invert sugar’ is prepared by acid catalyzed hydrolysis of maltose
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Solution

The correct options are
A Specific rotation of invert sugar is 20o
C ‘Invert sugar’ is an equimolar mixture of D-(+)-glucose and D-(–)-fructose
C12H22O11H+H2OC6H12O6D(+)glucose+C6H12O6D()fructose

Specific rotation of D-(+)-glucose is +52o and that of D-(-)-fructose is 92o.

αinvert sugar=+52o+(92o)2=20o

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