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Ionic Equlibrium Test - 5

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Ionic Equlibrium Test - 5
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  • Question 1
    1 / -0

    The Bronsted acid which gives the weakest conjugate base is

    Solution

    A strong acid gives a weak base. HCl is the strongest acid among the given options and hence, has the weakest conjugate base.

    NOTE: Among hydrogen halides, the acidic strength increases down the group as the H-X bond length increases. Hence, HCl is a stronger acid than HF.

  • Question 2
    1 / -0

    Which of the following salts will not undergo hydrolysis in water?

    Solution

    Salts of strong acids and strong bases (e.g. Na2SO4) do not undergo hydrolysis.

     

  • Question 3
    1 / -0

    When aqueous solutions of two acids have the same concentration of common ions, they are called

    Solution

    If the concentration of the common ions in the solution of two electrolytes, for example H+ ion concentration in HCl and HNO3 or OH− ion concentration in Ca(OH)2 and Ba(OH)2 is same, then on mixing them there is no change in the degree of dissociation of either of the electrolytes. Such solutions are called isohydric solutions.
    Hence, option (2) is correct.

     

  • Question 4
    1 / -0

    Which of the following solutions acts as a buffer?

    Solution

    A buffer solution is the one whose pH changes when small quantities of an acid or an alkali are added to it.
    The solution of CH3COOH + CH3COONa acts as a buffer.

     

  • Question 5
    1 / -0

    A solution which resists the change in its pH value on addition of some amount of acid or base is called

    Solution

    Buffer is a solution which resists the change in its pH when an acid or an alkali is added to it.

     

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