Which of the following monosaccharide is non-rotatory but reducing sugar?

Glyceraldehyde

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Glucose

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Ribose

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Dihydroxy acetone.

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Solution

The correct option is D Dihydroxy acetone.
$(D)$ Dihydroxy acetone
Because, in Dihydroxy acetone, there is $^{'} α^{'} -$ hydroxy group so, it is reducing and keto group is also present. So, it is non-rotatory.

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Which of the following monosaccharide is non-rotatory but reducing sugar?

The correct option is D Dihydroxy acetone.(D) Dihydroxy acetone Because, in Dihydroxy acetone, there is ′α′−hydroxy group so, it is reducing and keto group is also present. So, it is non-rotatory.

The correct option is D Dihydroxy acetone.
$(D)$ Dihydroxy acetone
Because, in Dihydroxy acetone, there is $^{'} α^{'} -$ hydroxy group so, it is reducing and keto group is also present. So, it is non-rotatory.