Question

The specific conductances of four electrolytes in $oh{m}^{-1}c{m}^{-1}$ are given below. Which one offers higher resistance to passage of electric current?

• A. $7.0\times {10}^{-5}$
• B. $9.2\times {10}^{-9}$
• C. $6.0\times {10}^{-7}$
• D. $4.0\times {10}^{-8}$

Answer 1

Answer: (B)

$9.2\times {10}^{-9}$

$\text{Specific conductance}=\frac{\text{Cell constant}}{\text{Resistance}}$

$\therefore \text{Specific conductance}\propto \frac{1}{\text{Resistance}}$

$\therefore$ The one with the lowest resistance $\left(order{10}^{-9}\right)$ will have the highest specific conductance.

Hence, option B is correct.