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ChemistryJEE Main 24 Jan 2026, Shift 1·Q8·MCQ·Easy–moderate

Coordination Compounds · Ionisation isomers precipitation

Consider a mixture ‘X' which is made by dissolving 0.4 mol of [Co(NHX3)X5SOX4]Br\ce{[Co(NH3)5SO4]Br} and 0.4 mol of [Co(NHX3)X5Br]SOX4\ce{[Co(NH3)5Br]SO4} in water to make 4 L of solution. When 2 L of mixture ‘X' is allowed to react with excess of AgNOX3\ce{AgNO3}, it forms precipitate ‘Y'. The rest 2 L of mixture ‘X' reacts with excess BaClX2\ce{BaCl2} to form precipitate ‘Z'. Which of the following statements is CORRECT.
  1. (1)0.2 mol of ‘Z' is formed
  2. (2)‘Y' is BaSOX4\ce{BaSO4} and ‘Z' is AgBr
  3. (3)0.4 mol of ‘Z' is formed
  4. (4)0.1 mol of ‘Y' is formed

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See the full 24 Jan 2026, Shift 1 paper