JEE Advanced 2016 Chemistry 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 +66°, +140°, –52° and +92°, respectively)

(A)'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
(B)'invert sugar' is an equimolar mixture of D-(+)-glucose and D-(–)-fructoseCorrect
(C)specific rotation of 'invert sugar' is –20°Correct
(D)on reaction with water, 'invert sugar' forms saccharic acid as one of the products

Answer: (B),(C)

Solution

(A) Invert sugar is obtained by hydrolysis of sucrose (maltose gives only glucose): false. (B) Sucrose hydrolysis gives equal amounts of D-(+)-glucose and D-(–)-fructose: true. (C) The D-sugars are the enantiomers of the given L-sugars, so D-glucose is and

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Question ID VK-026567