JEE Main202624 January 2026Morning ShiftChemistryCoordination CompoundsActual
Consider a mixture ' X ' which is made by dissolving 0.4 mol of [ Co ( NH ₃ )₅ SO ₄ ] Br and 0.4 mol of [ Co ( NH ₃ )₅ Br ] SO ₄ in water to make 4 L of solution. When 2 L of mixture ' X ' is allowed to react with excess of AgNO ₃ , it forms precipitate ' Y '. The rest 2 L of mixture ' X ' reacts with excess BaCl ₂ to form precipitate ' Z '. Which of the following statements is CORRECT?
Options
- A0.1 mol of ' Y ' is formed.
- B0.2 mol of ' Z ' is formed.
- C0.4 mol of ' Z ' is formed.
- D^ Y ^ is BaSO ₄ and ' Z ' is AgBr.
Correct answer
B. 0.2 mol of ' Z ' is formed.
Step-by-step solution
0.4 mol [Co(NH₃)₅SO₄]Br + 0.4 mol [Co(NH₃)₅Br]SO₄ are present in 4 lit. solution. 2 lit. of mixture will contain 0.2 mol of each complex. 2 lit. mixture on reaction with excess AgNO₃ , 0.2 mole AgBr will be formed (Y). 2 lit. mixture on reaction with excess BaCl₂ , 0.2 mole BaSO₄ will be formed (Z).