Given below are two statements: Statement I : D-glucose pentaacetate reacts with 2, 4-dinitrophenylhydrazine Statement II : Starch, on heating with concentrated sulfuric acid at $$100^{\circ}$$ and 2-3 atmosphere pressure produces glucose. In the light of the above statements, choose the correct answer from the options given below

We analyze both statements about glucose derivatives and starch.

Statement I: D-glucose pentaacetate reacts with 2,4-dinitrophenylhydrazine (2,4-DNP).

2,4-DNP reacts with the carbonyl group ($$C=O$$) of aldehydes and ketones. In D-glucose pentaacetate, all five hydroxyl groups (including the one at C-1) are acetylated. The C-1 hydroxyl is converted to an acetate ester, meaning the hemiacetal/open-chain aldehyde form is blocked. Since there is no free aldehyde group available, D-glucose pentaacetate does NOT react with 2,4-DNP. Statement I is FALSE.

Statement II: Starch, on heating with concentrated sulfuric acid at 100 degrees C and 2-3 atm pressure, produces glucose.

Starch undergoes acid-catalyzed hydrolysis. When heated with dilute or concentrated sulfuric acid under the given conditions, the glycosidic bonds in starch break down to yield glucose (the monomer unit). Statement II is TRUE.

The answer is Option A) Statement I is false but Statement II is true.