Question

Assertion: A solution of sucrose in water is dextro-rotatory but upon the hydrolysis in the presence of a little hydrolysis in the presence of a little hydrochloric acid, it becomes laevo rotatory.
Reason: Sucrose upon hydrolysis gives unequal amounts of glucose and fructose. As a result, change in sign of rotation is observed.
A. If both assertion and reason are correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If both assertion and reason are incorrect.

Answer 1

Correct Answer - C
Correct reason: Sucrose upon hydrolysis forms equal amounts of glucose and fructose but the laevo rotation of fuctrose is more than the dextro rotation of glucose.