Dry Test Analysis for action of KMnO4 Solution

Boil 1 gm of mixture with 2 cm³ of dilute H₂SO₄ to eliminate all gases. Then cool it and add KMnO₄ Solution dropwise.

Sr. No.	Observations	Interference
1.	Colour of KMnO₄ solution with the formation of characteristic product: a. Colorless and odourless gas, turns lime water milky-CO₂. b. Colour of reaction mixture becomes orange or brown. Cool, and water and SO₂. On shaking, CS₂ layer acquires a colour: i. Violet ii. Orange iii. Smell of Cl₂. Dip a litmus paper, it is decolorized.	Oxalate or Tartrate (or both). Iodide Bromide Chloride
2.	Colour of KMnO₄ solution is decolorized without the formation of any characteristic product.	All above mentioned radicals are absent. Fe²⁺ & Sn²⁺ may be present.
3.	Colour of KMnO₄ solution is not decolorized.	All above mentioned radicals are absent.

Chemistry by Burhan Ishaque