Question

Which of the following statements is correct regarding variations of molar conductivity with concentration?

• A. molar conductivity decreases with decrease in concentration
• B. Variation in molar conductivity of weak and strong electrolytes is same
• C. Molar conductivity increases with decrease in concentration
• D. When concentration of the solution approaches zero, the molar conductivity is known as conductance

Answer 1

The correct option is C Molar conductivity increases with decrease in concentration

We know the relation between molar conductivity and Molarity,

${\Lambda }_m=\frac{\kappa \times 1000}{M}$

As seen in the above equation we can arrive at a conclusion that ${\Lambda }_m^0$ is inversely proportional to Molarity.

And hence if we increase concentration of solution molar conductivity decreases and vice-versa.