AIPMT MAINS 2009 Chemistry Conductance of Electrolytes MCQ Question
The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mhos cm² and at infinite dilution is 400 mhos cm². The dissociation constant of this acid is:
1.25 × 10⁻⁶
6.25 × 10⁻⁴
1.25 × 10⁻⁴
6.25 × 10⁻⁶
Correct Answer
Detailed Explanation
The dissociation constant (K_a) can be calculated using the formula K_a = (C × λ²)/(λ₀ - λ), where C is the concentration, λ is the equivalent conductance at concentration C, and λ₀ is the equivalent conductance at infinite dilution.
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