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JEE Main 201322 AprilOnline
Exam
JEE Main
Year
2013
Date
22 April
Mode
Online
Subject
Chemistry
Chapter
Surface Chemistry

JEE Main 2013 · 22 April · Online · Chemistry · Surface Chemistry

Flocculation value of BaCl_2 is much less than that of KCl for sol...

Flocculation value of BaCl2\mathrm{BaCl}_2 is much less than that of KCl\mathrm{KCl} for sol A\mathrm{A} and flocculation value of Na2SO4\mathrm{Na}_2 \mathrm{SO}_4 is much less than that of NaBr\mathrm{NaBr} for sol B\mathrm{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\mathrm{B} '.
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