Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Olympiad workbookNSECPractical Chemistry

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

No Solution

Practice Practical Chemistry on Quantrex Academy →

More from Practical Chemistry

A colorless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns white on cooling. An aqueous solution of the original soliAddition of dil. HCl to an aqueous solution of a mixture of two inorganic salts yielded white precipitate E and filtrate F . Precipitate E dissolved in hot water. F in alkaline aliPassing H ₂ ~S gas into a mixture of Mn ²⁺, Ni ²⁺, Cu ²⁺ and Hg ²⁺ in an acidified aqueous solution precipitatesIn 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 extraA colorless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns white on cooling. An aqueous solution of the original soliPassing H ₂ ~S gas into a mixture of Mn ²⁺, Ni ²⁺, Cu ²⁺ and Hg ²⁺ in an acidified aqueous solution precipitatesAddition of dil. HCl to an aqueous solution of a mixture of two inorganic salts yielded white precipitate E and filtrate F . Precipitate E dissolved in hot water. F in alkaline ali Full Practical Chemistry list All Olympiad workbook PYQs