LAQ : A glass rod moistened with con. HCl is introduced in a full of gas. White fumes are produced. Identify the gas in the jar. What is the compound giving fume?

Question

A glass rod moistened with con. HCl is introduced in a full of gas. White fumes are produced. Identify the gas in the jar. What is the compound giving fume? Give equation.

Answer

The white fumes produced when a glass rod moistened with concentrated HCl is introduced into a jar of gas are due to the formation of hydrochloric acid (HCl) gas. The gas in the jar could be ammonia (NH₃), which reacts with HCl gas to form a white smoke of ammonium chloride (NH₄Cl) salt. The balanced chemical equation for this reaction is:

NH₃ + HCl → NH₄Cl

Therefore, the compound giving white fumes is ammonium chloride (NH4Cl), which is formed by the reaction between ammonia (NH₃) and hydrochloric acid (HCl).