Assertion: A solution of sucrose in water is dextro-rotatory. But on hydrolysis in the presence of a little hydrochloric acid it becomes laevo-rotatory.
Reason : Sucrose on hydrolysis gives unequal amounts of products whose sign of rotation is changed.

Question

Assertion: A solution of sucrose in water is dextro-rotatory. But on hydrolysis in the presence of a little hydrochloric acid it becomes laevo-rotatory.

Reason : Sucrose on hydrolysis gives unequal amounts of products whose sign of rotation is changed.

TestHub · Accepted Answer

C 12 H 22 O 11 ⟶ C₆H₁₂O₆ (glucose) + C 6 H 12 O 6 (fructose) (+) (+) (-) The specific rotation of fructose is greater than glucose; as a result, an inversion of optical rotation occurs.

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