Single Choice

Fructose reduces Tollen's reagent due to:

Aasymmetric carbons
Bprimary alcoholic groups
Csecondary alcoholic group
Denolisation of fructose followed by conversion to aldehyde by base
Correct Answer

Solution

Fructose reduces Tollen's reagent due to enolisation of fructose followed by conversion to aldehyde by base.

Only aldehydes reduce Tollen's reagent. But fructose is a ketone.

In aqueous solution, fructose is enolised and then converted into aldehyde in basic medium.

All aldehydes generally reduce Tollen's reagent, thus fructose also reduces Tollen's reagent.

Option D is correct.

SIMILAR QUESTIONS

Biomolecules

Which of the following statements is correct ?

Biomolecules

Which of the following statement is not true for glucose?

Biomolecules

$$A, B$$ and $$C$$ are three biomolecules. The results of the tests performed on them are given below : Molisch's Test Barfoed Test Biuret Test $$A$$ Positive Negative Negative $$B$$ Positive Positive Negative $$C$$ Negative Negative Positive $$A, B$$ and $$C$$ are respectively :

Biomolecules

Fructose and glucose can be distinguished by:

Biomolecules

What will happen when $$D-(+)-$$ glucose is treated with methanolic $$-HCl$$ followed by Tollens' reagent?

Biomolecules

Fructose reduces Tollen's reagent due to:

Biomolecules

Which of the following pairs give positive Tollen's test?

Biomolecules

A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is:

Biomolecules

How many moles of $$(C)$$ react with $$1\ mol\ PhNHNH_2$$

Biomolecules

Which of the following pairs gives positive Tollens test?

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