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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
(b) Zinc carbonate(s) → Zinc oxide (s) + Carbon dioxide (g) bromide(s)
(c) Hydrogen (g) + Chloride (g) → Hydrogen chloride (g)
(d) Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g)
Example: $\underset{(aq)}{Pb(NO_{3})_{2}}+\underset{(aq)}{2KI}\rightarrow \underset{yellow \; pp}{PbI_{2}(\downarrow)} +\underset{(aq)}{2KNO_{3}}$]
A combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product).
It may be presented in the following form A + B --> AB.
eg: H2 + Cl2 --> 2HCl
REACTANT 1 + REACTANT 2 -----> PRODUCT
A displacement reaction is one wherein the atom or a set of atoms is displaced by another atom in a molecule. The general equation for displacement reaction is,
A + B-C → A-C + B.