Ionic Conductance

Q. The specific conductance of $\frac{N}{10}KCl$ solution at ${20}^{\circ }C$ is $0.0212oh{m}^{-1}c{m}^{-1}$ and the resistance of cell containing this solution at ${20}^{\circ }C$ is 55 ohm. The cell constant is

1. $1.166c{m}^{-1}$
2. $2.173c{m}^{-1}$
3. $3.324c{m}^{-1}$
4. $4.616c{m}^{-1}$

Q. The equivalent conductance of NaCl at concentration C and at infinite dilution are ${\lambda }_C$ and ${\lambda }_{\infty }$ respectively. The correct relationship between ${\lambda }_{C}and{\lambda }_{\infty }$ is given as (where, the constant B is positive)

1. ${\lambda }_c={\lambda }_{\infty }+\left(B\right)C$
2. ${\lambda }_c={\lambda }_{\infty }-\left(B\right)C$
3. ${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$
4. ${\lambda }_c={\lambda }_{\infty }+B\sqrt{C}$

Q. At 300 K molar conductivity of solution A is 350 units. and at infinite dilution the molar conductivity of the same sample is 480 unit. Predict the percentage dissociation of the electrolyte.

1. 37.0 %
2. 73.0 %
3. 63.0 %
4. 137.0 %