An unknown mixture contains one or two of the following : , , ,

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

An unknown mixture contains one or two of the following : CaCO3\text{CaCO}_3 , BaCl2\text{BaCl}_2 , AgNO3\text{AgNO}_3 , Na2SO4\text{Na}_2\text{SO}_4 , ZnSO4\text{ZnSO}_4 and NaOH\text{NaOH} . The mixture is completely soluble in water and solution gives pink colour with phenolphthalein. When dilute hydrochloric acid is gradually added to the solution, a precipitate is formed which dissolves with further addition of the acid. The aqueous solution of mixture gives white precipitate with dil. HCl\text{HCl} which dissolves in excess of dil. HCl\text{HCl} . It confirms: (1) BaCl2+NaOH\text{BaCl}_2 + \text{NaOH} (2) Na2SO4+NaOH\text{Na}_2\text{SO}_4 + \text{NaOH} (3) ZnSO4+NaOH\text{ZnSO}_4 + \text{NaOH} (4) AgNO3+NaOH\text{AgNO}_3 + \text{NaOH}

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