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).
