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Q.

1 -Propanol and 2-propanol can be best distinguished by

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a

oxidation with alkaline KMnO4 followed by reaction with Fehling solution

b

oxidation with acidic dichromate followed by reaction with Fehling solution

c

oxidation by heating with copper followed by reaction with Fehling solution

d

oxidation with concentrated H2SO4 followed by reaction with Fehling solution

answer is C.

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Detailed Solution

Fehling solution is a weak oxidizing agent which can oxidize aliphatic aldehyde but not ketone.Primary alcohols undergo oxidation with alkaline KMnO4, acidic dichromate and conc. H2SO4 to give acids, whereas with Cu they give aldehydes.CH3CH2CH2OHPropanol-1→HeatCuCH3CH2CHO              Propanalresponds Fehling solutionCH3CHOHCH3Propanol-2→CH3COCH3            Propanonenegative Fehling solution
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