Question

2. Study the following chemical equations: (i) CuO + H2 → Cu + H2O
(ii) MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
(iii) 2PbO + C → 2Pb + CO2
(a) Show the oxidation and reduction reactions taking place in each of the above.
(b) Write the oxidising and reducing agents in each.

Answer 1

Explanation:

(i) maganese dioxide when reacted with hydrochloric acid forms maganese chloride, chloride and water.

(ii) H2+CuO=H2O+Cu

Answer 2

Explanation:

(i) - (a) CuO gets reduced to Cu

H2 gets oxidised to H2O

(b) oxidising agent - CuO

reducing agent - H2

(ii) - (a) MnO2 gets reduced to MnCl2

HCl gets oxidised to Cl2

(b) oxidising agent - MnO2

reducing agent - HCl

(iii) - (a) PbO gets reduced to Pb

C gets oxidised to CO2

(b) oxidising agent - PbO

reducing agent - C