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 ${\text{H}}_{\text{2}}$.

Nitrogen belongs to group $\text{3A}$ of the periodic table and is an unreactive gas. It is also colorless and odourless. The molecular formula is ${\text{N}}_{\text{2}}$.

Oxygen belongs to group $\text{4A}$ 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 ${\text{O}}_{\text{2}}$.