Question

How can we obtain oxygen gas in points..

Answer 1

HEY ❤️

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OXYGEN CAN BE OBTAINED BY THE PROCESS OF FRACTIONAL DISTILLATION.

AND

To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.

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HOPE IT HELPS ☺️

Answer 2

It is liberated on heating

(a) metal nitrates

(b) metal oxides like HgO, PbO2, Pb3O4 etc.

(c) oxysalts like potassium chlorate, potassium dichromate, potassium permanganate etc.