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Practical Work — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryPractical Work2 Marks
Question
A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.
✓

Answer

$C$ is silver chloride which is soluble in ammonia.
Pungent smelling gas B is ammonia.
White solid $A$ is ammonium chloride.
$
NH _4 Cl ( s ) \xrightarrow{ NaOH } NH _3( g )+ H _2 O + NaCl
$
$
NH _3( g ) \xrightarrow{\text { Red litmus }} \text { blue litmus }
$
$
\underset{ A }{ NH _4 Cl ( s )} \underset{ HNO _3}{ AgNO _3} AgCl ( s )
$

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