Question

The number of phenylhydrazine molecules required for $1molecule$ of glucose osazone formation is:

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is C 3

$3$ molecules of hydrazine required to form glucose osazone'-one' forms bonds in place carbonyl group.

Second one makes $-OH$ to carbonyl and third replaces $-OH$ as hydrazone.