4. What information does the following chemical equations convey?
(a) Zn + H2SO4 → ZnSO4 + H2
(b) Mg + 2HCl → MgCl2 + H2
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Explanation:
(a) Zinc mixed with sulfuric acid gives rise to zinc sulphate and hydrogen gas.
(b) Magnesium mixed with hydrochloric acid gives rise to magnesium chloride and hydrogen gas
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