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Chemistry Question on General Principles and Processes of Isolation of Elements

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

Nitrous oxide

Explanation

Solution

The reaction between Lead Sulphide (PbS) and dilute nitric acid (HNO3HNO_3) proceeds as follows:

PbS+2HNO3→Pb(NO3)2+NO+S+H2OPbS + 2HNO_3 \rightarrow Pb(NO_3)_2 + NO + S + H_2O

Key Points:

  1. The products of this reaction are:
    • Lead nitrate (Pb(NO3)2Pb(NO_3)_2) – a soluble salt.
    • Nitric oxide (NO) – a gaseous product.
    • Sulphur (S) – a precipitate.
    • Water (H2OH_2O).
  2. Nitrous oxide (N2ON_2O) is not formed during this reaction.