Question

Identify the substances getting oxidised and reduced in the following chemical reactions: (a)cuo + h2 heat= cu + h2o (b)mno2+4hcl=mncl2+2h2o+cl2

Answer 1

Answer:

Here MnO2 undergoes a gain in electrons and gets converted to MnCl2 (loss of oxygen/gain in electrons) and therefore is being reduced.

Since MnO2 gains electrons, HCl must be losing them - being the only other product of the reaction. So, HCl is being oxidised.