The molar conductivity for electrolytes A and B are plotted against C1/2 as shown below. Electrolytes A and B…
Electrochemistry · Class 12 · JEE Main Previous Year Question
The molar conductivity for electrolytes A and B are plotted against as shown below. Electrolytes A and B respectively are:
- a
A: strong electrolyte; B: weak electrolyte
- b
A: weak electrolyte; B: weak electrolyte
- c✓
A: weak electrolyte; B: strong electrolyte
- d
A: strong electrolyte; B: strong electrolyte
A: weak electrolyte; B: strong electrolyte
Strategy: Distinguish between strong and weak electrolytes based on the shape of the vs. curve.
Curve Analysis:
- Plot A: Represents a steep, rapid increase in molar conductivity at very low concentrations. This is characteristic of weak electrolytes (like ) where dilution leads to a massive increase in dissociation ().
- Plot B: Represents a linear decrease with concentration. This follows the Debye-Hückel-Onsager equation, characteristic of strong electrolytes (like ) where ions are already fully dissociated and dilution only redu\ces inter-ionic attractions.
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