Alcohol, Phenol and EtherHard
Question
1-propanol and 2-propanol can be best distinguished by :
Options
A.oxidation with alkaline KMnO4 following by reaction with Fehling solution
B.oxidation with acidic dichromate following by reaction with Fehling solution
C.xidation with heating with copper following by reaction with Fehling solution
D.oxidation with concentrated H2SO4 following by reaction with Fehling solution
Solution
On passing the vapours of 1-propanol and 2-propanol over heated Cu, 1-propanol will give propanal which reacts with Fehling′s solution to give red ppt. (a test used ot identify - CHO gp.). 2-propanol gives acetone in this reaction which does not react with Fehling′s solution.
Cu2O ↓ + CH3CH2COOH
redppt.
Cu2O ↓ + CH3CH2COOH
redppt.
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