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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Surface Chemistry

NTA Abhyas 2020 · Chemistry · Surface Chemistry

For coagulation of Arsenious sulphide sol, which one of the...

For coagulation of Arsenious sulphide sol, which one of the following salt solution will be most effective

Options

  1. A\text{AlC}{\text{l}_{3}
  2. BNaCl
  3. C\text{BaC}{\text{l}_{2}
  4. D\text{N}{\text{a}_{3}\text{P}{\text{O}_{4}

Correct answer

A. \text{AlC}{\text{l}_{3}

Step-by-step solution

Arsenious sulphide is -ve charged colloid. Hence, cation having maximum positive charge will be most effective for coagulation. (Hardy Schulz rule)
Al3+>Ba2+>Na+Al^{3 +} > Ba^{2 +} > Na^{+} (coagulating power)
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