JEE Advanced 2020 Chemistry question
A colorless aqueous solution contains nitrates of two metals, **X** and **Y**. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue **P** and a solution **Q**. The residue **P** was soluble in aq. and also in excess sodium thiosulfate. The hot solution **Q** gave a yellow precipitate with KI. The metals **X** and **Y**, respectively, are
Solution
With NaCl only the group-I cations precipitate as white chlorides: and ( and are soluble). dissolves in hot water (solution **Q**), while remains as residue **P**. dissolves in aqueous ammonia, $AgCl +
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