Which statement is true about glucose pentaacetate?It will react with phenylhydrazine but not with Tollens' reagent.It will react with Tollens' reagent but not with phenylhydrazine.It will react with both of the above mentioned reagents.It will react neither with phenylhydrazine nor with Tollens' reagent.
Question
Which statement is true about glucose pentaacetate?It will react with phenylhydrazine but not with Tollens' reagent.It will react with Tollens' reagent but not with phenylhydrazine.It will react with both of the above mentioned reagents.It will react neither with phenylhydrazine nor with Tollens' reagent.
Solution
The correct statement is: "It will react with phenylhydrazine but not with Tollens' reagent."
Here's why:
Glucose pentaacetate is a derivative of glucose where all the hydroxyl groups have been replaced by acetate groups. This means that it no longer has the aldehyde group that is necessary for the Tollens' reagent test, which detects aldehydes. Therefore, it will not react with Tollens' reagent.
On the other hand, phenylhydrazine reacts with the acetal functional group, which is present in glucose pentaacetate. Therefore, glucose pentaacetate will react with phenylhydrazine.
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