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Flocculation value of BaCl ₂ is much less than that of KCl for sol A and flocculation value of Na ₂ SO ₄ is much less than that of NaBr for sol B . The correct statement among the following is :

Options

  1. ABoth the sols A and B are negatively charged.
  2. BSol A is positively charged and Sol B is negatively charged.
  3. CBoth the sols A and B are positively charged.
  4. DSol A is negatively charged and sol B is positively charged.

Correct answer

B. Sol A is positively charged and Sol B is negatively charged.

Step-by-step solution

In first case the given compounds have same anion but different cations having different charge hence they will precipitate negatively charged sol i.e. 'A'. In second case the given compounds have similar cation but different anion with different charge. Hence they will precipitate positively charged sol. i.e. ' B '.

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