Question

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

• A. Oxidation with alkaline KMnO₄followed by reaction with Fehling's solution.
• B. Oxidation with acidic dichromate followed by reaction with Fehling's solution.
• C. Oxidation by heating with copper followed by reaction with Fehling's solution.
• D. Oxidation with conc.H₂SO₄ followed by reaction with Fehling's solution.

Answer 1

The correct option is C

Oxidation by heating with copper followed by reaction with Fehling's solution.

When 1-propanol is heated with copper, it is oxidized to aldehyde which on passing through Fehling's solution gives red ppt. whereas 2-propanol on heating with copper, get oxidized to ketone which doesn't react with Fehling's solution.