Question

Resistance of a decimolar solution between two electrodes 0.02 meter apart and $0.0004m^2$ in area was found to be 50 ohm. Specific conductance $\left(\kappa \right)$ is

• A. $0.01S-m^{-1}$
• B. $1S{m}^{-1}$
• C. $0.1S{m}^{-1}$
• D. $2\times {10}^{-4}S{m}^{-1}$

Answer 1

The correct option is B $1S{m}^{-1}$

$k=c\frac{l}{A}$
$=\frac{1}{R}\frac{l}{A}=\frac{1}{50}\frac{0.02}{0.0004}$
$=\frac{1\times 10000\times 2}{50\times 4\times 100}=1S{m}^{-1}$