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Solution


Q.

Consider a mixture ‘X’ which is made by dissolving 0.4 mol of [Co(NH3)5SO4]Br and 0.4 mol of [Co(NH3)5Br]SO4 in water to make 4 L of solution. When 2 L of mixture ‘X’ is allowed to react with excess AgNO3, it forms precipitate ‘Y’. The rest 2 L of mixture ‘X’ reacts with excess BaCl2 to form precipitate ‘Z’. Which of the following statements is CORRECT              [2026]
1 0.4 mol of ‘Z’ is formed.  
2 ‘Y’ is BaSO4 and ‘Z’ is AgBr.  
3 0.1 mol of ‘Y’ is formed.  
4 0.2 mol of ‘Z’ is formed.  

Ans.

(4)