Choose solvent solute in the following cases
(i) Brine solution
(ii) Crystalline copper sulphate
(iii) Aq. Solution of copper sulphate

Explanation

To solve the question of identifying the solvent and solute in the given cases, we will analyze each case step by step.

### Step-by-Step Solution:

**(i) Brine Solution:**
1. **Definition:** Brine is a solution of salt (sodium chloride, NaCl) in water.
2. **Identification of Solvent and Solute:**
- **Solvent:** Water (H₂O) is the medium in which the salt is dissolved.
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