Question

Which of the following relation is not correct?

• A. Equivalent conductivity: ${\text{Scm}}^{2}e{q}^{-1}$
• B. Conductance: ${\text{Ω}}^{-1}$
• C. Specific conductance: $\text{S cm}$
• D. Cell constant: ${\text{cm}}^{-1}$

Answer 1

The correct option is C

Specific conductance: $\text{S cm}$

The explanation for the correct option:

Specific conductance:

1. Specific conductance is a substance's ability to conduct electricity.
2. It is the inverse of specific resistance.
3. $\mathrm{Specific}\mathrm{Conductance}=\mathrm{Conductance}\times \mathrm{Cell}\mathrm{Constant}.$
4. The unit of specific conductance is ${\text{S cm}}^{-1}$.

The explanation for incorrect options:

Equivalent conductivity:

1. Equivalent The conducting power of all the ions produced by dissolving one gram equivalent of an electrolyte in solution is defined as conductivity.
2. It is written as and has a specific conductance as.
3. Unit of Equivalent conductivity is ${\text{Scm}}^{2}e{q}^{-1}$.

Conductance:

1. Conductance is an extrinsic property, whereas conductivity is an inherent property.
2. This implies that conductance is a property of an object that depends on its quantity/mass or physical form and scalability.
3. Unit of Conductance is ${\text{Ω}}^{-1}$.

Cell Constant:

1. The cell constant is the ratio of the distance between the electrodes $\left(l\right)$ to the cross-sectional area $\left(A\right)$.
2. Unit of Cell constant is ${\text{cm}}^{-1}$.

Hence, option (C) is correct.