To obeserve the effect of concentration on the conductivity, electrolytes of different natures are taken in two vessels `A` and `B,` A contains weak electrolyte, `e.g., NH_(4)OH` and `B` contains strong electrolyte, `e.g., NaCl`. In both containers, the concentration of respective electrolyte is increased and the conductivity observed`:`

Options

A. in `'A'` conductivity increased , in `'B'` conductivity decreases
B. in `'A'` conductivity decreases while in `'B'` conductivity increases
C. in both `'A'` and `'B'` conductivity increases
D. in both `'A'` and `'B'` conductivity decreases

Answer

4

Explanation

Weak electrolyte is weakly ionizing substance, dilution promotes ionization thus conductivity.
For strong electrolyte, as concentration increases interionic attraction increases and conduct on decreases.