Some Gases

Laboratory Preparation of Hydrogen

Hydrogen gas is produced when Zinc, Magnesium, or other active metals are treated with dilute Sulfuric acid.

Testing of Hydrogen Gas

When a burning matchstick is placed over the mouth of the gas jar containing Hydrogen gas, it immediately extinguishes with a pop sound.

Laboratory Preparation of Nitrogen Gas

Nitrogen gas is produced when the mixture of Sodium Nitrite and Ammonium chloride in the solution state.

Testing of Nitrogen Gas

When a burning Magnesium ribbon is inserted into the gas jar containing nitrogen, it burns in nitrogen forming a yellow powder of Magnesium nitride (Mg₃N₂).

Laboratory Preparation of Oxygen Gas

In the laboratory, Oxygen gas can be produced through two methods. They are:

1. Using Heat

Oxygen gas is produced when Potassium chlorate (KClO₃) is heated in the presence of Manganese dioxide (MnO₂) as a catalyst.

2. Without Using Heat

Oxygen is produced when Hydrogen peroxide (H₂O₂) is decomposed in the presence of Manganese dioxide (MnO₂) as a catalyst.

Testing of Oxygen Gas

When the burning matchstick is inserted into the gas jar containing Oxygen gas, the flame becomes brighter.