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Q.
The open-chain glucose on oxidation with $HIO_{4}$ gives
NTA AbhyasNTA Abhyas 2022
Solution:
Both -CHO(aldehydic) group and -RCHOH(Secondary alcoholic) group form HCOOH on reaction with HIO4 while $-CH_{2}OH$ (primary alcoholic) group forms $H_{2}C=O$ (fromaldehyde)