Let CnaCl and BaSO C 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? (A) Ionic mobilities of io

Question

Let CnaCl and BaSO C 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?

(A) Ionic mobilities of ions from both salts increase with T.
(B) BaSO NaCl C C at a given T
(C) ) T ( C ) T ( C BaSO BaSO 4 for T2 > T1
(D) ) T ( C ) T ( C NaCl NaCl for T2 > T1

Prashant Kotian · Accepted Answer

Correct answer: A. (i) Ionic mobilities decrease with increase in temperature due to increase in random motion and hence decrease in relaxation time so decrease in drift speed. (i) NaCl is completely soluble salt while BaSO4 is sparingly soluble salt so C1 >> C2. (ii) On increase in temperature conductance increase.

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