Question

What is redox reaction? Identify the substance
oxidised and the substance reduced in the following
reactions
(1) CuO + H2O->Cu + H2O
(1) MnO2 + 4HCL-> MnCl2+ Cl+ 2H2O​

Answer 1

Answer:

A redox reaction in which substances undergo oxidation and reduction.

Oxidation : Addition of substances

Reduction: Removal of substances

1. Oxygen is reduced .

2. Chlorine is oxidized.

Answer 2

A chemical reaction in which both lose and gain of electrons takes place such that a metal donates the electron from its valence shell and a non metal accepts it.

1) In equation 1 Copper is reduced as loss of oxygen means reduction.

2) Here,MnO2 is reduced and HCl is oxidised as loss of Hydrogen means oxidation.