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  4. Periodic acid splits glucose and fructose into formaldehyde and formic acid, Ratio of moles of formic acid in glucose and fructose is

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Q. Periodic acid splits glucose and fructose into formaldehyde and formic acid, Ratio of moles of formic acid in glucose and fructose is

NTA AbhyasNTA Abhyas 2020Biomolecules

Solution:

$CHO-CHOH-\underset{g l u c o s e}{C H O H}-CHOH-CHOH-CH_{2}OH\overset{5 H I O_{4}}{ \rightarrow }5HCOOH+HCHO+5HIO_{3}$

$\text{CH}_{2} \text{OH} - \overset{\underset{\left|\right. \left|\right.}{\text{O}}}{\text{C}} - \underset{\text{fructose}}{\text{CHOH}} - \text{CHOH} - \text{CHOH} - \text{CH}_{2} \text{OH} \overset{5 \text{HIO}_{4}}{ \rightarrow } 3 \text{HCOOH} + 2 \text{HCHO} + 5 \text{HIO}_{3} + \text{CO}_{2} + \text{H}_{2} \text{O}$

So molar ratio is 5:3