Classify the following reactions into different types: (i) AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) (ii) CaO(s) + H2O(
Question
Classify the following reactions into different types:
(i) AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
(ii) CaO(s) + H₂O(l) → Ca(OH)₂(aq)
(iii) 2KClO₃(s) → 2KCl(aq) + 3O₂(g)
(iv) Zn + CuSO₄ → ZnSO₄ + Cu
Verified Answer
(i) Double Displacement Reaction
AgNO₃(aq) + NaCl(aq) → AgCl(s)↓ + NaNO₃(aq)
The two reactants exchange ions. Silver pairs with chloride forming an insoluble precipitate.
(ii) Combination Reaction
CaO(s) + H₂O(l) → Ca(OH)₂(aq)
Two reactants combine to form a single product — calcium hydroxide.
(iii) Decomposition Reaction
2KClO₃(s) → 2KCl(s) + 3O₂(g)↑
A single compound breaks down into two simpler substances on heating.
(iv) Displacement Reaction
Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s)
Zinc displaces copper from its salt solution.