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NEET levelSingle correct optionDifficulty 1 of 3ro076

Which of the following does NOT react with $HIO X_{4}$ ?

Aethane-1,2-diol
Bbutane-2,3-diol
Cpropane-1,2,3-triol
Dpropane-1,3-diol

Answer: D

Periodic acid cleaves only compounds with oxygenated carbons directly bonded (1,2-diols, 1,2,3-triols and similar). Propane-1,3-diol has a

CH X_{2}

between the two carbinol carbons, so it is inert.

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