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Study of Compounds - Hydrogen Chloride — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryStudy of Compounds - Hydrogen Chloride3 Marks
Question
Give three distinct test [apart from using an indicator] you would carry out with solution of $HCl$ to illustrate the typical properties of an acid.
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Answer

Three tests are:
HCl gas gives thick white fumes of ammonium chloride when glass rod dipped in ammonia solution is held near the vapours of the acid.
$NH_3 + HCl ⟶ NH_4Cl$
With silver nitrate HCl gives white precipitate of silver chloride. The precipitate is insoluble in nitric acid but soluble in ammonium hydroxide.
$AgNO_3 + HCl ⟶ AgCl + HNO_3$​​​​​​​
A greenish yellow gas is liberated when concentrated hydrochloric acid is heated with oxidizing agent like manganese dioxide.
$MnO_2 + 4HCl ⟶ MnCl_2 +2H_2O + Cl_2​​​​​​​$​​​​​​​

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