Question

How to make oxygen gas in laboratry?​

Answer 1

Oxygen gas can be prepared in the laboratory by hydrogen peroxide and manganese dioxide. In this reaction manganese dioxide is used as catalyst. The apparatus is set up as shown in the figure. ... The produced oxygen gas is collected in the gas jar by downward displacement of water.

Answer 2

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

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