Assertion: A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of a little hydrochloric acid, it becomes laevorotatory.
Reason: Sucrose on hydrolysis gives unequal amounts of glucose and fructose. As a result of this change in sign of rotation is observed.

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Assertion is true and reason is false

Both assertion and reason are true and reason is correct explanation of assertion

Both assertion and reason are true but reason is not correct explanation of assertion

Assertion is false and reason is true

answer is C.

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Detailed Solution

Sucrose on hydrolysis gives equal amounts of glucose & fructose but laevorotation of fructose (-92.4º) is more than dextrorotation of glucose (+52.5º)

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