Question

Propan-1-ol and propan-2-ol can be distinguished by

• 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 conc. H₂SO₄ followed by reaction with Fehling solution

Answer 1

The correct option is C

Oxidation by heating with copper followed by reaction with Fehling solution

$C{H}_{3}C{H}_{2}C{H}_{2}OH\stackrel{\left[O\right]}{\to }C{H}_{3}C{H}_{2}CHO$

1 propanol Gives +ve test with Fehling’s solution

$O||C{H}_{3}CH-C{H}_3\stackrel{\left[O\right]}{\to }C{H}_3-C-C{H}_3|OH\text{Gives -ve test with}\text{Fehlings solution}$