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Let C NaCl and C BaSO 4 , be the conductances (in S) measured for saturated aqueous solutions of NaCl and B a S O 4 respectively, at a temperature T. Which of the following is false?

Options

  1. Alonic mobilities of ions from both salts increase with T.
  2. BC BaSO 4 T 2 > C BaSO 4 T 1   for   T 2 > T 1
  3. CC NaCl T 2 > C NaCl T 1   for   T 2 > T 1
  4. DC NaCl ≫ C BaSO 4 at given T

Correct answer

A. lonic mobilities of ions from both salts increase with T.

Step-by-step solution

(i) Ionic mobilities decreases with increase in temperature due to increase in random motion and hence decrease in relaxation time so derease in drift speed. (i) NaCl is completely soluble salt while BaSO 4 is sparingly soluble salt so C 1 > > C 2 . (ii) On increasse in temperature conductance increase.

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