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Question
How can you prove that hydrochloric acid contain :
Chlorine?
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Solution
On reaction with oxidizing agents, hydrochloric acid forms respective salts water and pungent smelling, greenish yellow chlorine gas.
\[\ce{\underset{\text{Manganses dioxide}}{MnO4} + 4HCl -> \underset{\text{Manganese chloride}}{MnCl2(aq)} + 2H2O + Cl2 ^}\]
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