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The molar conductance of NaCl varies with the concentration as shown in the following table and all values follows the equation. `lambda_(m)^(c)=lambda_(m)^(oo)-bsqrt(C)` where `lambda_(m)^(c)`= molar specific conductance `lambda_(m)^(oo)=` molar specific conductance at infinite dilution C=molar concentration When a certain conductivity cell (C) was filled with 25`xx10^(-4)(M) NaCl` solution, the resistance of the cell was found to be 1000 ohm. At infinite dilution, conductance of `Cl^(-)` and `SO_(4)^(2-)` are `80ohm^(-1) cm^(2) "mole"^(-1)` and `160ohm^(-1) cm^(2) "mole"^(-1)` respectively. What is the molar conductance of NaCl at infinite dilution?A. `147 ohm^(-1) cm^(2) ""mole""^(-1)`B. `107ohm^(-1) cm^(2) "mole"^(-1)`C. `127 ohm^(-1) cm^(2) "mole"^(-1)`D. `157ohm^(-1) cm^(2) "mole"^(-1)` |
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Answer» Correct Answer - C |
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