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Ionic Equilibrium Test - 3

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Ionic Equilibrium Test - 3
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  • Question 1
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    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.

     

  • Question 2
    1 / -0

    The factor that does not affect the state of equilibrium is

    Solution

    Catalyst helps in the attainment of equilibrium, but it does not affect the state of equilibrium.

     

  • Question 3
    1 / -0

    On addition of some amount of acid or base, a solution which resists the change in its pH value is called

    Solution

    A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
    Buffers are broadly divided into two types: acidic and alkaline buffer solutions.
    Acidic buffers are solutions that have a pH below 7 and contain a weak acid and one of its salts.
    Basic buffers are solutions that have a pH above 7 and contain a weak base and one of its salts.

     

  • Question 4
    1 / -0

    The solubility of CO2 in water increases with

    Solution

    This is in accordance with Henry's law.
    'At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to partial pressure of that gas in equilibrium with that liquid.'

     

  • Question 5
    1 / -0

    In which of the following solvents does AgBr have the greatest solubility?

    Solution

    AgBr is insoluble in water and separates as a pale yellow precipitate in the aqueous solutions.
    The solubility is low in NaBr and HBr owing to the common ion effect.
    In case of 10-3 M NH4OH solvent, the common ion effect is minimum; hence, the solubility is maximum.

     

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