Question

Identify the type of reaction in the following (a) ZnCO3 + 2HCl (aq) ZnCl2(aq) + H2CO3 (aq) (b) 2NaBr (aq) +Cl (g) 2Nacl (aq) + Br2 (aq) (c) 2CuO (S) Heat 2Cu (s) +O2 (g)

Answer 1

Answer:

• a double displacement reaction
• b single displacement reaction
• c decomposition reaction

Answer 2

Answer:

ZnCO₃ + 2HCl(aq) → ZnCl₂(aq) + H₂CO₃(aq) : Double Displacement reaction

2NaBr(aq) + Cl (g) → 2NaCl(aq) + Br₂(aq) : Displacement reaction

2CuO(s) Heat → 2Cu(s) +O₂(g) : Decomposition reaction

Explanation:

Combination Reaction: The chemical reaction where two or more reactants (elements or compounds) are combined to form a single new product is called a combination reaction.

Decomposition Reaction: The chemical reaction where a compound is broken up into two or more than two simple products (elements or compounds) is called a decomposition reaction.

Displacement Reaction: The chemical reactions where an element displaces the other element from a compound are called displacement reactions.

Double Displacement reaction: The chemical reaction where two compounds react together and form two new compounds by exchanging one of their ions is called a double displacement reaction.

(a) ZnCO₃ + 2HCl(aq) → ZnCl₂(aq) + H₂CO₃(aq)

Double Displacement reaction

(b) 2NaBr(aq) + Cl (g) → 2NaCl(aq) + Br₂(aq)

Displacement reaction

(c) 2CuO(s) Heat → 2Cu(s) +O₂(g)

Decomposition reaction

Hence, ZnCO₃ + 2HCl(aq) → ZnCl₂(aq) + H₂CO₃(aq) is a Double Displacement reaction, 2NaBr(aq) + Cl (g) → 2NaCl(aq) + Br₂(aq) is a Displacement reaction and 2CuO(s) Heat → 2Cu(s) +O₂(g) is a Decomposition reaction.

#SPJ2