Match List-I with List-II
| List-I (Reaction) | List-II (Type) | ||
|---|---|---|---|
| (A) | Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s) | (I) | Combination reaction |
| (B) | CaCO3(s) → CaO(s) + CO2(g) | (II) | Decomposition reaction |
| (C) | 2H2(g) + O2(g) → 2H2O(l) | (III) | Displacement reaction |
| (D) | Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq) | (IV) | Double displacement reaction |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
(A) Fe + CuSO4 → FeSO4 + Cu — this matches (III) Displacement reaction. Iron is more reactive than copper, so it pushes copper out of copper sulphate solution.
(B) CaCO3 → CaO + CO2 — this matches (II) Decomposition reaction. On heating, one reactant breaks down into two products, quicklime and carbon dioxide.
(C) 2H2 + O2 → 2H2O — this matches (I) Combination reaction. Two substances combine to form a single product, water.
(D) Na2SO4 + BaCl2 → BaSO4 + 2NaCl — this matches (IV) Double displacement reaction. The two compounds exchange their ions, and white insoluble barium sulphate settles as a precipitate.