Write the balanced chemical equation for the following and identify the type of reaction in each case.

Options

A. Potassium bromide(aq) + Barium iodide(aq) `rarr` Potassium iodide(aq) + Barium bromide(s)
B. Zinc carbonate(s) `rarr` Zinc oxide(s) + Carbon dioxide(g)
C. Hydrogen(g) + Chlorine(g) `rarr` Hydrogen chloride(g)
D. Magnesium(s) + Hydrochloric acid(aq) `rarr` Magnesium chloride(aq) + Hydrogen(g)

Explanation

To solve the question of writing balanced chemical equations and identifying the type of reaction for each case, we will go through each part step by step.

### Part A: Potassium Bromide and Barium Iodide

1. **Write the unbalanced equation:**
- Reactants: Potassium Bromide (KBr) + Barium Iodide (BaI2)
- Products: Potassium Iodide (KI) + Barium Bromide (BaBr2)
- Unbalanced equation:
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