Class 12 Chemistry P Block Elements Preparation of Dioxygen

Preparation of dioxygen

General method of preparation:

We get oxygen whenever we heat any metal oxide like:


In laboratory we prepare oxygen by:

By heating potassium chlorate


This reaction occurs on heating, in presence of MnO2 at 420k.

Industrial preparation: By electrolysis of water.

The silent electric discharge is passed so that the reaction do not becomes reversible.

H2 + O2 ---> H2O

Share these Notes with your friends  

< Prev Next >

You can check our 5-step learning process