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Chemistry Test ...

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  • Question 1
    4 / -1

    A certain weak acid has a dissociation constant of 10–4. The equilibrium constant for its reaction with a strong base is :-

  • Question 2
    4 / -1

    Which of the following pairs constitutes buffer solution?

  • Question 3
    4 / -1

    It is found that at 25°C 0.1 M solution of four sodium salts NaA, NaB, NaC and NaD have the pH values 7, 9, 10, 11 respectively. Which one of the corresponding acids is strongest?

  • Question 4
    4 / -1

    On adding 0.1 M solution each of Ag+, Ba+2, Ca+2  ions in a Na2SO4 solution, species first precipited is (Ksp for BaSO4 = 10–11, Ksp for CaCO3 = 10–6,Ksp for Ag2SO4 = 10–5).

  • Question 5
    4 / -1

    If pKb of a base is 5, then Ka of its conjugate acid will be

  • Question 6
    4 / -1

    Which of the following is the correct quadratic form of Ostwald's dilution law equation for AB type electrolyte :

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