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MHT CET Medical202622 April 2026Morning ShiftChemistryIonic EquilibriumActual

Calculate the percent dissociation of a weak mono-acidic base if its concentration is 0.02 M. [ K _b for weak mono-acidic base = 1.8 10⁻⁵ ]

Options

  1. A4 %
  2. B2 %
  3. C3 %
  4. D5 %

Correct answer

C. 3 %

Step-by-step solution

For a weak mono-acidic base, the degree of dissociation is given by the formula: = K_b C Substituting the given values: K_b = 1.8 10⁻⁵ C = 0.02 M = 1.8 10⁻⁵ 0.02 = 9 10⁻⁴ = 3 10⁻² Percent dissociation = 100 = 3 10⁻² 100 = 3 % Answer: 3 %

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