Identify the type of chemical reaction taking place
(i) on mixing a solution of potassium chloride with silver nitrate, an insoluble white substance is formed.
(ii) on heating green coloured ferrous sulphate crystals, reddish-brown solid is left and smell of a gas having odour of burning sulphur is observed.

Explanation

To identify the types of chemical reactions taking place in the given scenarios, we will analyze each situation step by step.

### (i) Mixing Potassium Chloride with Silver Nitrate

1. **Identify the Reactants**: The reactants in this reaction are potassium chloride (KCl) and silver nitrate (AgNO3).

2. **Understand the Reaction**: When these two solutions are mixed, a chemical reaction occurs between the ions present in the solutions. Potassium ions (K⁺) and nitrate ions (NO3⁻) are soluble, while silver ions (Ag⁺) and chloride ions (Cl⁻) can form an insoluble compound.

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