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Solutions Test - 5

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Solutions Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Which of the following solutions shows positive deviation from Raoult's law?

    Solution

    On mixing cyclohexane to ethyl alcohol, some of the hydrogen bonds between ethyl alcohol molecules are broken. Due to this vapour pressure of the solution formed by them increases. Hence solution show positive deviation from Raoult's law

     

  • Question 2
    1 / -0

    The phenomenon of flow of solvent molecules through a semi permeable membrane from pure solvent to solution is called

    Solution

    The phenomenon of flow of solvent molecules through a semi permeable membrane from pure solvent to solution is called Osmosis.

     

  • Question 3
    1 / -0

    Which of the following would be the correct unit of expressing Henry's law constant?

    Solution

    Since mole fraction does not have any unit, unit in which pressure is expressed will be the same unit in which Henry's law constant is expressed.

     

  • Question 4
    1 / -0

    For a binary ideal solution, the total pressure of the solution is given as

    Solution

    For a binary ideal solution, the total pressure is

    ptotal = x1p10 + x2p20

    =(1-x2)p10 + x2p20

    =p10+ (p20-p10) x2

     

  • Question 5
    1 / -0

    Fill in the blank.

    Boiling point of solution containing a non volatile solute is always ---- the boiling point of pure solvent in which solution is prepared.

    Solution

    Due to presence of non-volatile solute, more heat is required to make the vapour pressure of solution equal to atmospheric pressure. Hence boiling point of solution increases and is higher than boiling point of solvent.

     

  • Question 6
    1 / -0

    Liquid - liquid solutions can be classified into ideal and non-ideal solutions on basis of which law ?

    Solution

    Liquid - liquid solutions can be classified into ideal and non-ideal solutions on basis of Raoult's law.

     

  • Question 7
    1 / -0

    Which of the following is a colligative property?

    Solution

    Relative lowering of vapour pressure is a colligative property.

     

  • Question 8
    1 / -0

    0.01 M solutions of urea, common salt and sodium sulphate are taken The ratio of depression of freezing point will be in the ratio

    Solution

    The ratio is similar to the ratio of their van't Hoff factor i.e 1:2:3  for urea, common salt and sodium sulphate respectively.

     

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