Question

On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed ?

• A. Lead nitrate
• B. Sulphur
• C. Nitric oxide
• D. Nitrous oxide

Answer 1

The Correct Option is D

To address this query, it is necessary to comprehend the chemical reaction between Lead Sulphide (PbS) and dilute nitric acid (HNO₃).

The chemical reaction between lead sulphide and dilute nitric acid is depicted as follows:

\(PbS + 4HNO_3 \rightarrow Pb(NO_3)_2 + 2H_2O + 2NO_2 + S\)

An examination of the reaction reveals the formation of the subsequent products:

• Lead Nitrate (Pb(NO₃)₂)
• Sulphur (S)
• Nitrogen Dioxide (NO₂)
• Water (H₂O)

Evaluating the provided options leads to the following conclusions:

• Lead Nitrate: This compound is generated as a primary product during the reaction.
• Sulphur: This element is also produced, as indicated in the reaction equation.
• Nitric Oxide (NO): This compound is absent from the reaction, and thus, it is not formed.
• Nitrous Oxide (N₂O): This compound is not mentioned in any aspect of the reaction and is not a typical byproduct when lead sulphide reacts with dilute nitric acid.

Based on this analysis, the definitive conclusion is:

Nitrous oxide (N₂O) is not a product of this reaction.