AIPMT PRELIMS2005Chemistry-Chemical Equilibrium
AIPMT PRELIMS 2005 Chemistry Dissociation Constants MCQ Question
Type: MCQ-numerical-Medium-Class 11
At 25°C, the dissociation constant of a base, BOH, is 1.0 × 10⁻¹². The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be:
A
1.0 × 10⁻⁶ mol L⁻¹
B
1.0 × 10⁻⁵ mol L⁻¹
C
1.0 × 10⁻⁸ mol L⁻¹
D
1.0 × 10⁻⁷ mol L⁻¹
Correct Answer
Option D
Detailed Explanation
The concentration of hydroxyl ions can be calculated using the formula for the dissociation constant Kb = [OH⁻]² / [BOH]. Solving for [OH⁻] gives 1.0 × 10⁻⁶ mol L⁻¹.
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