Question

Identify the correct name of law.
"At infinite dilution each ion migrates independent of co-ion and contributes to total molar conductivity of an elctrolyte irrespective of the nature of other ion to which it is associated."

• A. Henry's law
• B. Raoult's law
• C. Nernst derivative law
• D. Kohlrausch's law of independent migration of ions

Hint:

At infinite dilution each ion contributes independently to molar conductivity, which is the Kohlrausch law.

Answer 1

The Correct Option is D

Step 1: Identify the idea.
Each ion migrates independently and gives its own share of conductance. The sum of the two shares gives the limiting molar conductivity.

Step 2: Name it.
$\Lambda^0_m = \nu_+ \lambda^0_+ + \nu_- \lambda^0_-$ is Kohlrausch law of independent migration of ions.

Step 3: Rule out others.
Henry law deals with gases and Raoult law deals with vapour pressure, so neither matches.

Final Answer:
Option (D). \[ \boxed{\text{Kohlrausch law}} \]