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Glucose molecule reacts with 'X' number of molecules of phenylhydrazine to yield osazone. The value of 'X' is

1. (a) four
2. (b) one
3. (c) two
4. (d) three

Correct answer: (d) three

Solution

Glucose reacts with three molecules of phenylhydrazine to form an osazone. Two molecules react with the carbonyl group and one with the adjacent hydroxyl group.

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