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Chemistry
Assertion: Fructose is a reducing sugar. Reason: It has a ketonic group.
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Q.
Assertion:
Fructose is a reducing sugar.
Reason:
It has a ketonic group.
AIIMS
AIIMS 2011
Biomolecules
A
If both assertion and reason are true and reason is the correct explanation of assertion
43%
B
If both assertion and reason are true but reason is not the correct explanation of assertion
43%
C
If assertion is true but reason is false
7%
D
If both assertion and reason are false
7%
Solution:
All those carbohydrates which contain aldehydic or ketonic group in the hemiacetal or hemiketal form and reduce Tollen's or Fehling's solutions are reducing sugars. All monosaccharides are reducing sugars (whether aldoses or ketoses).
Fructose is a monosaccharide with keto group.