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In qualitative inorganic analysis of a water-soluble salt mixture (salt AB + salt XY ) both the cations were identified as sulphides. In the tests for anions sodium carbonate extract when treated with AgNO ₃ gave yellowish precipitate soluble with difficulty in NH ₄ OH while the other anion can be confirmed with brown ring test. (Given K _ sp for AS =1 10⁻⁴⁴ and XS =1.4 10⁻²⁴ ). Identify the INCORRECT statement about

Options

  1. AH ₂ ~S can be used under appropriate conditions of pH to separate and identify the cations.
  2. BCation A will be precipitated under acidic condition as the concentration of sulphides ions required is low.
  3. CThe anions are NO ₃⁻ and Cl ⁻ .
  4. DCation X will be precipitated as sulphides under alkaline condition, as the concentration of sulphides ions re

Correct answer

C. The anions are NO ₃⁻ and Cl ⁻ .

Step-by-step solution

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