Question

Statement 1: Fructose can give Tollens' test even though it does not have an aldehyde group.
Statement 2: When reacted with base, fructose can undergo rearrangement to produce an aldehyde group.

• A. If both Statement 1 and Statement 2 are true and Statement 2 is the correct explanation of the assertion.
• B. If both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of the assertion.
• C. If Statement 1 is true but Statement 2 is false.
• D. If both Statement 1 and Statement 2 are false.

Hint:

When dealing with sugars, understand that they can undergo tautomerization, which may expose aldehyde groups under certain conditions, allowing them to react in typical aldehyde tests like Tollens'.

Answer 1

The Correct Option is A

- Statement 1: Fructose can give Tollens' test because, despite not having an aldehyde group in its standard form, it undergoes tautomerization to form an aldehyde group when in an alkaline medium. This aldehyde group is reactive towards Tollens' reagent, which is why it can give a positive Tollens' test. - Statement 2: This statement is correct because fructose, in the presence of a base, rearranges to produce an aldehyde group. Thus, both statements are true, and Statement 2 correctly explains why Statement 1 is true.