To suggest an experiment to identify hydrogen, nitrogen or oxygen gas. Concept introduction: Hydrogen is the lightest element present in the periodic table. It is a colorless and non-toxic gas. However, it is highly flammable. Hydrogen can be prepared by the elcetrolysis of water. The molecular formula is H 2 . Nitrogen belongs to group 3A of the periodic table and is an unreactive gas. It is also colorless and odourless. The molecular formula is N 2 . Oxygen belongs to group 4A of the periodic table and is an oxidizing agent. It reacts with other metals and non-metals to form corresponding oxides. The molecular formula is O 2 .

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Chapter 21, Problem 125SCQ

Interpretation Introduction

Interpretation:

To suggest an experiment to identify hydrogen, nitrogen or oxygen gas.

Concept introduction:

Hydrogen is the lightest element present in the periodic table. It is a colorless and non-toxic gas. However, it is highly flammable. Hydrogen can be prepared by the elcetrolysis of water. The molecular formula is H2.

Nitrogen belongs to group 3A of the periodic table and is an unreactive gas. It is also colorless and odourless. The molecular formula is N2.

Oxygen belongs to group 4A of the periodic table and is an oxidizing agent. It reacts with other metals and non-metals to form corresponding oxides. The molecular formula is O2.

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