1. Which of the following reactions are metathesis reactions?

(a) 2KCIO3 - 2KCI + 302

(b) Cu (NO3) 2 + Zn - > Cu + Zn (NO3) 2

(c) BaCO3 + 2 HCl → BaCl2 + H2O + CO2

(d) Na2CO3 + CuSO4 → Na2SO4 + CuCO3

... 1

(d) Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃

Explanation:

Chemical reaction:

Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃

This is metathesis reaction. It is also called double displacement reaction. The cation and anions of both reactants exchange with each others.

The cation (Na⁺) of sodium carbonate is exchange with cation (Cu²⁺) of copper sulfate and form sodium sulfate and copper carbonate.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC + BD