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)

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)

TestHub · Accepted Answer

Question Explanation: Define and evaluate statements about invert sugar.

Concept:

Invert sugar is the product of sucrose hydrolysis, characterized by a change in optical rotation.

Solution:

An equimolar mixture of D - (+) glucose and D - (-) fructose.

Specific Rotation: Calculated as

$\frac{+ 52. 5 ^{\circ} + ( - 92. 4 ^{^{\circ}} )}{2} \approx - 2 0^{^{^{\circ}}}$ (levorotatory).

Incorrect Statements: It is not prepared from maltose, and glucose forms gluconic acid (not saccharic acid) with Br₂ water.

Final Answer: The correct options are (B) & (C).

Chemistry - Biomolecules Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion