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AP EAMCET2015ChemistrySurface Chemistry

Which of the following is the most effective in causing coagulation of ferric hydroxide solution?

Options

  1. AKCl
  2. BKNO₃
  3. CK₂SO₄
  4. DK ₃ [ Fe ( CN )₆ ]

Correct answer

D. K ₃ [ Fe ( CN )₆ ]

Step-by-step solution

Ferric hydroxide solution, is a negatively charged sol. aligned & KCl K ⁺+ Cl ⁻ & KNO ₃ K ⁺+ NO ₃⁻ & K ₂ SO ₄ 2 ~K ⁺+ NO ₄²⁻ & K ₃ [ Fe ( CN )₆ ] 3 ~K ⁻+ [ Fe ( CN )₆ ]³⁻ aligned Hence, K ₃ [ Fe ( CN )₆ ] will be most effective in causing coagulation of ferric hydroxide solution.

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