Question

Give two confirmatory tests for chloride ion.

Answer 1

1. Silver Nitrate Test: Add silver nitrate (AgNO₃) solution to the salt solution. A curdy white precipitate of silver chloride (AgCl)) forms, which dissolves completely in excess ammonium hydroxide (NH₄OH).
2. Chromyl Chloride Test: Heat the dry salt with solid potassium dichromate (K₂Cr₂O₇) and concentrated sulphuric acid. Distinct reddish-brown vapours of chromyl chloride (CrO₂Cl₂) will evolve.