Write balanced equation for the following:
(i). `NaCl` is heated with sulphuric acid in the presence of `MnO_2`.
(ii). Chlorine gas is passed into a solution of NaI in water.

Explanation

To solve the question, we need to write balanced chemical equations for the two reactions described. Let's break it down step by step.

### Part (i): NaCl heated with sulfuric acid in the presence of MnO₂

1. **Identify the reactants and products**:
- Reactants: Sodium chloride (NaCl), sulfuric acid (H₂SO₄), and manganese dioxide (MnO₂).
- Products: Manganese(II) chloride (MnCl₂), sodium hydrogen sulfate (NaHSO₄), water (H₂O), and chlorine gas (Cl₂).

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