Question

Identify whether reduction or oxidation has taken place in the following :
1. Pb(s) +CuCl2(aq) - - - - -> PbCl2(aq) +Cu(s)
2. MnO2+Hcl-----> MnCl2+H2O+Cl2

Answer 1

2.MnO2 undergoes reduction.

HCl undergoes oxidation

HCl undergoes oxidation again for cl2