Question

P, Q, R and S are the different methods of preparation of salts.

P - Simple displacement

Q - Neutralisation by titration 

R - Precipitation 

S - Direct combination

Choose the most appropriate method to prepare the following salts:

1. PbCl₂
2. FeCl₃
3. Na₂SO₄

Answer 1

1. PbCl₂ is an insoluble salt formed by the R-Precipitation reaction.
2. FeCl₃ can be prepared by the reaction of iron with chlorine gas through the S - Direct combination.
3. Na₂SO₄ is a soluble salt that can be prepared by Q - Neutralisation by titration.