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Write the balanced chemical equation for the following and identify the type of reaction in each case.
a) Potassium bromide(aq) + Barium iodide(aq) ➝ Potassium iodide (aq) + Barium bromide(s)
b) Zinc carbonate(s) ➝ Zinc oxide(s) + Carbon dioxide(g)
c) Hydrogen(g) + Chlorine(g) ➝ Hydrogen chloride(g)
d) Magnesium(s) + Hydrocholoric acid(aq) ➝ Magnesium chloride(aq) + Hydrogen(g)

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a) 2KBr(aq) + Bal2(aq) → 2KI(aq) + BaBr2(s) → double displacement reaction.
b) ZnCO3(s) → ZnO(s) + CO2(g) → decompoistion reaction.
c) H2(g) + Cl2(q) → 2HCl(g)  combination reaction
d) Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) → displacement reaction.

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