Question

Given below are two statements:
Statement I: Sucrose is dextrorotatory. However, sucrose upon hydrolysis gives a solution having mixture of products. This solution shows laevorotation.
Statement II: Hydrolysis of sucrose gives glucose and fructose. Since the laevorotation of glucose is more than the dextrorotation of fructose, the resulting solution becomes laevorotatory.
In the light of the above statements, choose the correct answer from the options given below.

• A. Statement I is false but Statement II is true
• B. Statement I is true but Statement II is false
• C. Both Statement I and Statement II are false
• D. Both Statement I and Statement II are true

Hint:

Hydrolysis of sucrose produces invert sugar, which is laevorotatory due to the dominant optical rotation of fructose.

Answer 1

The Correct Option is D

Step 1: Analysis of Statement I.
Sucrose is dextrorotatory in nature. On hydrolysis, sucrose breaks down into equimolar amounts of glucose and fructose, forming invert sugar. The resulting solution shows laevorotation. Hence, Statement I is correct.
Step 2: Analysis of Statement II.
Glucose is dextrorotatory, whereas fructose is strongly laevorotatory. The magnitude of laevorotation of fructose is greater than the dextrorotation of glucose. Therefore, the net rotation of the mixture becomes laevorotatory. Hence, Statement II is also correct.
Step 3: Final conclusion.
Both Statement I and Statement II are true.
Final Answer: \[ \boxed{\text{Both Statement I and Statement II are true}} \]