Assertion : Treatment of D-glucose with alkali affords an equilibrium , D-fructose and starting substance D-glucose,
Reason: The reaction invovels an intermediate in which hybridization of `C_(2)` change from `sp^(3)` to `sp^(2)`

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

A

Explanation

A dilute solution of glucose, when warmed with dilute solution of alkali, some glucose is converted into fructose and mannose.
This solution exists as an equilibrium mixture. This reaction involves an intermediate in which hybridization of `C_2` changes from `sp^3` to `sp^2` in the enol intermediate.