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प्रश्न
Distinguish by a chemical test sodium chloride and sodium sulphite.
उत्तर १
The salts can be distinguished by using silver acetate. To the salt, silver acetate and dil. HNO3 are added. If there is formation of a white precipitate that slowly turns black then it is thiosulphate anion since silver acetate forms Ag2S2O3 which being unstable in acid solution gets converted to black Ag2S.
उत्तर २
\[\ce{NaCl + H2SO4 -> NaHSO4 + HCl}\]
\[\ce{Na2SO3 + H2SO4 -> Na2SO4 + H2O + SO2}\]
When sodium sulphite reacts with H2SO4 to produce sulphur dioxide gas, sodium chloride reacts with H2SO4 to produce HCl gas.
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