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To observe the effect of concentration on the conductivity electrolytes of different nature were taken in two vessels A and B. A contains weak electrolyte NH4OH and .B contains strong electrolyte NaCl. In both containers, concentration of respective electrolyte was increased and the observation is

(a) in A conductivity increases, in B conductivity decreases

(b) in A conductivity decreases, while in B conductivity increases

(c) in both A and B conductivity increase

(d) in both A and B conductivity decrease. 

1 Answer

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Best answer

Correct option (d) in both A and B conductivity decrease.

Explanation:

Solution which contains large number of ions compared to another solution of same concentration at the same temperature has more conductance and is said to be stronger electrolyte. The one which has relatively small number of ions is called weak electrolyte. If concentration of respective electrolyte is increased, the equivalent conductance decreases in each case, but rapid decrease in equivalent conductance is seen in weak electrolyte.

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