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JEE Main2012ChemistryIonic EquilibriumActual

The pH of a 0.1 molar solution of the acid HQ is 3 . The value of the ionization constant, Ka of this acid is :

Options

  1. A3 10⁻¹
  2. B1 10⁻³
  3. C1 10⁻⁵
  4. D1 10⁻⁷

Correct answer

C. 1 10⁻⁵

Step-by-step solution

[ H ⁺ ]= K _ a C 10⁻³= K _ a 10⁻¹ K _ a =10⁻⁵

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