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Question

Identify the substance 'Q' based on the information given below.

The white crystalline solid 'Q' is soluble in water. It liberates a pungent smelling gas when heated with sodium hydroxide solution.

A
Ammonia
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B
HCl
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C
Ammonium chloride
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D
None of these
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Solution

The correct option is B Ammonium chloride
The white crystalline solid is ammonium chloride formed by mixing gases ammonia and hydrochloric acid. When ammonium chloride is heated with sodium hydroxide solution ammonia gas is evolved.
NH4Cl+NaOHNH3+NaCl+H2O

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