Formation of white precipitate on mixing sodium chloride solution and silver nitrate solution is an example of …………… reaction.

1. Combination
2. Decomposition
3. Displacement
4. Double decomposition

A brown substance A on heating in air turns black forming another substance B. Substances A and B are:

1. A = Fe and B = FeO
2. A = Zn and B = ZnO
3. A = Cu and B = CuO
4. A = Pb and B = PbO

The reaction of neutralization is a :

1. Displacement reaction
2. Double decomposition
3. Combination reaction
4. Combination reaction between two compounds

FeS + H₂SO₄ ⟶ FeSO₄ + H₂S is an example of:

1. Displacement reaction
2. Double decomposition reaction
3. Decomposition reaction
4. Combination reaction