Give a chemical test to identify the following gas : Ammonia

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Solution

Chemical tests to identify Ammonia:
Litmus test
Ammonia, ${NH}_{3}$ gas is basic in nature.
It is soluble in water.
Its aqueous solution can turn the red litmus paper to blue and no change will be observed if a blue litmus paper is used.
Other tests:
Ammonia gas when brought near Hydrochloric acid, they react to form dense white fumes of Ammonium chloride.
Reaction:
${NH}_{3} (g) + HCl (aq) \to {NH}_{4} Cl (g)$

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