Quiz 9 for Class 12 Chemistry Chapter 2 Solutions

Quiz 9 for Class 12 Chemistry Chapter 2 Solutions

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Quiz 9 : Solutions - Class 12 Chemistry

Negative Marking :- No

Weightage per Question :- 1 Mark

Number of Questions :- 15

Duration of Quiz :- 15 min

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1) Among the following, the azeotropic mixture is :

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2) PA and PB are the vapour pressure of pure liquid components A and B respectively of an ideal binary solution. If ‘XA‘ represents the mole fraction of component ‘A’, the total vapour pressure of the solution will be:

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3) What is the molality of a solution containing 200 mg of urea (molar mass 60 gm/mol) dissolved in 40 gm of water ?

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4) Which of the following pair of solutions are expected to be isotonic at the same temperature ?

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5) 138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is.

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6) Calculate the mass of urea (NH2CONH2) required in making 2.5 Kg of 0.25 molal aqueous solution.

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7) What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dilute HCl ?

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8) The molar concentration of the solution having osmotic pressure 0.0821 atm at 300 K will be:

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9) The molarity of a solution containing 5.0 gm of NaOH in 250 mL solution is :

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10) A 6.9 M solution of KOH in water contains 30% by mass of KOH. The density of KOH solution is :

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11) Lowering of vapour pressure of an aqueous solution of a non-volatile, non-electrolyte 1 molal aqueous solution at 100 °C is:

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12) The volume of 10 N and 4 N HCl required to make 1 L of 7 N HCl are :

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13) An aqueous solution boils at 100.512 °C. The freezing point of the solution is (Kf = 1.86 K Kg mol−1 and Kb = 0.512 K Kg mol−1) :

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14) Two liquids ‘A’ and ‘B’ have vapour pressure of 0.685 bar and 0.264 bar respectively. In an ideal solution of the two, the mole fraction of ‘A’ at which the two liquids have equal partial pressure is :

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15) Which of the following can be measured by the Ostwald-Walker dynamic method ?

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