Let C NaCl and C BaSO 4 , be the conductances (in S) measured for saturated aqueous solutions of NaCl and B…

Let CNaCl and CBaSO4, be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4 respectively, at a temperature T. Which of the following is false?
  1. lonic mobilities of ions from both salts increase with T.
  2. CBaSO4T2>CBaSO4T1 for T2>T1
  3. CNaClT2>CNaClT1 for T2>T1
  4. CNaCl≫CBaSO4 at given T

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 BaSO4 is sparingly soluble salt so C1>>C2.

(ii) On increasse in temperature conductance increase.

Asked in: JEE Main 2020 (03 Sep Shift 1)

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