Which of the following pair of monosaccharide | vedclass

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(C) When monosaccharides react with excess phenyl hydrazine,they form osazones. Monosaccharides that differ only in the configuration at the $C-1$ and

Vedclass · Accepted Answer

$D^{-}$-glucose and $D^{-}$-fructose

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(C) When monosaccharides react with excess phenyl hydrazine,they form osazones. Monosaccharides that differ only in the configuration at the $C-1$ and $C-2$ carbon atoms form the same osazone because the reaction involves the oxidation of the $C-2$ hydroxyl group and the formation of a hydrazone at $C-1$ and $C-2$. $D^{-}$-glucose,$D^{-}$-fructose,and $D^{-}$-mannose all form the same osazone because they have identical configurations at $C-3, C-4, C-5,$ and $C-6$. Therefore,the pair $D^{-}$-glucose and $D^{-}$-fructose will form the same osazone.

Which of the following pair of monosaccharides will form the same osazone when reacted with phenyl hydrazine?

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