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(B) The formation of osazone from $D^{-}$-glucose involves the reaction with $3$ equivalents of phenylhydrazine $(PhNHNH_2)$.$1$ equivalent is used fo

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$3$

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(B) The formation of osazone from $D^{-}$-glucose involves the reaction with $3$ equivalents of phenylhydrazine $(PhNHNH_2)$.$1$ equivalent is used for the oxidation of the $C-2$ hydroxyl group to a carbonyl group,while the other $2$ equivalents are used to form the phenylhydrazone linkages at $C-1$ and $C-2$ positions.The overall reaction is: $D^{-}$-glucose $+ 3 \, PhNHNH_2 	o 	ext{Glucosazone} + PhNH_2 + NH_3 + 2 \, H_2O$.

For the complex conversion of $D^{-}$-glucose into the corresponding osazone,the minimum number of equivalents of phenylhydrazine required is:

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