Question

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) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)


NCERT Class 10th Science Chapter 1 Chemical Reactions and Equations

Answer 1

(a) 2KBr (aq) + BaI2 (aq) → 2KI (aq) + BaBr2 (s): Double displacement reaction
(b) ZnCO3 (s) →  ZnO (s) + CO2 (g): Decomposition reaction

(c) H2 (g) + Cl2 (g) → 2HCl (g): Combination reaction

(d) Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g): Displacement Reaction

Answer 2

Answer:

Explanation: very easy

• 2KBr (aq) + BaI2 (aq) → 2KI (aq) + BaBr2 (s): Double displacement reaction

• ZnCO3 (s) →  ZnO (s) + CO2 (g): Decomposition reaction

• H2 (g) + Cl2 (g) → 2HCl (g): Combination reaction

• Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g): Displacement Reaction