Chemistry
Lead sulphate can be prepared by the following methods.
P Reacting lead with sulphuric acid.
Q Reacting lead nitrate with sodium sulphate solution.
R Reacting lead oxide with sodium sulphate solution.
(a) Only P
(b) Only Q
(c) Only R
(d) Both Q and R
Answer
Only Q
Reason — Insoluble lead sulphate is prepared from insoluble lead carbonate or insoluble lead oxide by first converting them into soluble lead nitrate (with the help of dilute nitric acid).
PbCO₃ + 2HNO₃ → Pb(NO₃)₂ + CO₂ + H₂O
PbO + 2HNO₃ → Pb(NO₃)₂ + H₂O
The resulting solution is then treated with sodium sulphate solution to get lead sulphate as a white precipitate.
Pb(NO₃)₂ + Na₂SO₄ → PbSO₄ ↓ + 2NaNO₃
Related Questions
Which one of the following will not produce acid with water ?
- CO
- CO2
- NO2
- SO3
The basicity of acetic acid is:
- 3
- 1
- 4
- 2
Assertion (A): All acids form hydronium ions when dissolved in water.
Reason (R): Every acid has hydrogen as the necessary element.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Assertion (A): All bases react with acids to form salt and water only.
Reason (R): All alkalis are bases but all bases are not alkalis.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.