Question

7.Match Column I with Column II and write the answers in column - III Column - I a) 2H20 (1) ► 2H2(g) + O2 (g) Column - II i) Displacement reaction b) Fe (s) + CuSO4 (aq) → FeSO4 (aq) +Cu (s) ii)Decomposition reaction c) NaOH(aq) + HCl(aq) → NaCl (aq) +H2O(1) iii) Combination reaction d) N2 (g) + 3H2 (g) → 2NH3(g) iv) Neutralisation reaction​

Answer 1

Answer]

(a) Combination reaction : Cao+CO2→CaCO3, in this reaction calcium oxide is combines with carbon dioxide to form calcium carbonate.

(b) Decomposition reaction : CaCO3→CaO+CO2, in this reaction calcium carbonate is decomposed to calcium oxide and carbon dioxide.

(c) Displacement reaction : Fe(s)+CuSO4(aq.)→FeSO4(aq)+Cu(s), in this reaction Fe displaces copper to form ferric sulphate.

(d) Analysis reaction : 2H2O→2H2+O2