Assertion :A solution of sucrose in water is dextrorotatory but on hydrolysis in the presence of $H^{⨁}$ ,it becomes leavorotatory. Reason: Inversion of sugar follows first order kinetics.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The solution having equal molecules of D-glucose and D-fructose is termed invert sugar. Hydrolysis of sucrose (dextro rotatory) gives equimolar mixture of glucose (dextro rotatory, +52.5 $^{o}$ ) and fructose (laevo rotatory, -92.4 $^{o}$ ). The mixture on the whole is laevorotatory and is called invert sugar. The process is called inversion. Inversion of sugar follows first order kinetics. The rate of inversion is directly proportional to concentration. Thus, Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

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Assertion :A solution of sucrose in water is dextrorotatory but on hydrolysis in the presence of H⨁,it becomes leavorotatory. Reason: Inversion of sugar follows first order kinetics.

Assertion :A solution of sucrose in water is dextrorotatory but on hydrolysis in the presence of $H^{⨁}$ ,it becomes leavorotatory. Reason: Inversion of sugar follows first order kinetics.