Question

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°C and 2-3 atmosphere pressure, produces glucose.
In the light of the above statements, choose the correct answer from the options given below:

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

Hint:

When dealing with organic reactions, always verify the conditions under which the reactions occur, as they greatly influence the outcome.

Answer 1

The Correct Option is C

Step 1: Statement I is true because D-glucose pentaacetate reacts with 2,4-dinitrophenylhydrazine to form a yellow-orange precipitate.
Step 2: Statement II is false because starch does not directly produce glucose by heating with concentrated sulfuric acid at 100°C; starch typically undergoes hydrolysis under such conditions.
Final Conclusion: The correct answer is Option (3), Statement I is true but Statement II is false.