Solutions Test

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Solutions Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows

A
negative deviations from Raoult’s law

B
positive deviations from Raoult’s law

C
no deviation from Raoult’s law

D
deviations which cannot be predicted from the given information.
Question 2
4 / -1

The osmotic pressure of a solution is given by the relation

A
π = ST/C

B
π = CT/S

C
π = SC/T

D
π/C = ST
Question 3
4 / -1

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water is

A
– 1.86^oC

B
– 3.72^oC

C
+1.86^oC

D
+3.72^oC

Solution
Question 4
4 / -1

At the same temperature which of the following solutions will be isotonic?

A
3.42 gm of sucrose per litre of water and 0.18 gm glucose per litre of water.

B
3.42 gm of sucrose per litre and 0.18 gm glucose in 0.1 litre of water.

C
3.42 gm of sucrose per litre of water and 0.585 gm of sodium chloride per litre of water.

D
3.42 gm of sucrose per litre of water and 1.17 gm of sodium chloride per litre of water.
Question 5
4 / -1

A molal solution is one that contains one mole of a solute in

A
1000 g of the solvent

B
One litre of the solvent

C
One litre of the solution

D
22.4 litres of the solution
Question 6
4 / -1

Which inorganic precipitate acts as a semipermeable membrane?

A
Calcium phosphate

B
Nickel phosphate

C
Calcium sulphate

D
Copper ferrocyanide
Question 7
4 / -1

The best and accurate method for determining osmotic pressure is

A
Negative pressure method

B
Berkeley and Hartley method

C
Morse and Frazer method

D
Preffer’s method
Question 8
4 / -1

When mercuric iodide is added to the aqueous solution of potassium iodide, the

A
freezing point is raised

B
freezing point is lowered

C
freezing point does not change

D
boiling point does not change
Question 9
4 / -1

Which of the following modes of expressing concentration is independent of temperature?

A
Molarity

B
Molality

C
Formality

D
Normality
Question 10
4 / -1

An ideal solution is formed when its components

A
have no volume change on mixing

B
have no enthalpy change on mixing

C
have both the above characteristics

D
have high solubility

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Solutions Test - 30

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Solutions Test - 30

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Question 1

negative deviations from Raoult’s law

positive deviations from Raoult’s law

no deviation from Raoult’s law

deviations which cannot be predicted from the given information.

Question 2

π = ST/C

π = CT/S

π = SC/T

π/C = ST

Question 3

– 1.86oC

– 3.72oC

+1.86oC

+3.72oC

Solution

Question 4

3.42 gm of sucrose per litre of water and 0.18 gm glucose per litre of water.

3.42 gm of sucrose per litre and 0.18 gm glucose in 0.1 litre of water.

3.42 gm of sucrose per litre of water and 0.585 gm of sodium chloride per litre of water.

3.42 gm of sucrose per litre of water and 1.17 gm of sodium chloride per litre of water.

Question 5

1000 g of the solvent

One litre of the solvent

One litre of the solution

22.4 litres of the solution

Question 6

Calcium phosphate

Nickel phosphate

Calcium sulphate

Copper ferrocyanide

Question 7

Negative pressure method

Berkeley and Hartley method

Morse and Frazer method

Preffer’s method

Question 8

freezing point is raised

freezing point is lowered

freezing point does not change

boiling point does not change

Question 9

Molarity

Molality

Formality

Normality

Question 10

have no volume change on mixing

have no enthalpy change on mixing

have both the above characteristics

have high solubility

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– 1.86^oC

– 3.72^oC

+1.86^oC

+3.72^oC