Question

When ammonia is passed through Nessler's solution the precipitate obtained is ______.

Options

• brown in colour

• blue in colour

• orange in colour

• yellow in colour

Answer 1

When ammonia is passed through Nessler's solution the precipitate obtained is brown in colour.

Explanation:

Nessler's reagent (K₂[HgI₄]) reacts with even trace amounts of ammonia to form a distinct brown precipitate (known as Iodide of Millon's base). This reaction is a standard test to detect ammonia.