Chapter - Solution (3)

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Q1. 4L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of theresultant solution is ________ *

1 point

0.004

0.008

0.012

0.016

Q2. What is mole fraction of solute in 1.00 m aqueous solution? *

1 point

0.0354

0.0177

0.177

1.770

Q3. When 1 mole of benzene is mixed with 1 mole of toluene (vapour pressure of benzene – 12.8 kPa,Toluene = 3.85 kPa) *

1 point

The vapour will contain equal amount of benzene and toluene.

Not enough information is given for prediction.

The vapour will contain a higher percentage of benzene.

The vapour will contain higher percentage of toluene.

Q4. At 100°C, the vapour pressure of a solution of 6.5 g of solute in 100 g of water is 732 mm. If K is 0.52K/m, the boiling point of solution will be - *

1 point

102°C

103°C

101 °C

100°C

Q5. If molality of solution is doubled, the value of molal depression constant (Kf) will be - *

1 point

halved

tripled

unchanged

doubled

Q6. Which has the highest freezing point? *

1 point

1 M glucose

1 M NaCl

1 M CaCl

1 M AlF3

Q7. Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is - *

1 point

0.46

0.40

0.20

0.36

Q8. Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are______________ *

1 point

M, m

F, x

m, x

M, x

Q9. Which of the following condition is not satisfied by an ideal solution? *

1 point

ΔH(mix) = 0

ΔV(mix) = 0

Raoult’s Law is obeyed

Formation of an azeotropic mixture

Q10. Which has the lowest boiling point at 1 atm pressure? *

1 point

0.1 M KCl

0.1 M Urea

0.1 M CaCl2

0.1 M A1Cl3

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