Solutions Test

Question 1
1 / -0.25

Which of the following is a colligative property?

A
Depression in freezing point

B
freezing point

C
Boiling point

D
Melting point

Question 2
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According to Raoult's law the relative lowering of vapour pressure for a solution is equal to -

A
Moles of solute

B
Mole fraction of solvent

C
Moles of solvent

D
Mole fraction of solute

Question 3
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Equimolar solutions of different non-volatile and non-ionic solutes in the same solvent have:

A
Different boiling and different freezing point

B
Same boiling point but different freezing point

C
Same boiling point and same freezing point

D
Same freezing point but different boiling point

Question 4

1 / -0.25

Match List-I with List-Il :

	List-I		List-Il
A	PPM	I	mol L^-1
B	Molarity	II	No units
C	Molality	III	Independent of temperature
D	Mole fraction	IV	Very dilute solutions

Choose the correct answer from the options given below :

A - IV, B - I, C - III, D - II

A - IV, B - II, C - I, D - III

A - II, B - I, C - IV, D - III

A - IV, B - III, C - II, D - I

Question 5
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By the addition of Ar gas to the system 2HI \(\rightleftharpoons\) H₂ + I₂, the degree of dissociation of HI will be -

A
Suppressed at constant pressure and constant volume both

B
Increased at constant pressure and decreased at constant volume.

C
Decreased at constant pressure and increased at constant volume.

D
Not altered at both constant pressure and constant volume

Question 6
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The mole fraction of a solute containing non-volatile solute is 0.20 and the vapour pressure of the solvent is 0.75 atm. What is the lowering in the vapor pressure of the solution?

A
0.2 atm

B
0.15 atm

C
0.30 atm

D
0.6 atm

Question 7
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The Osmotic pressure of solution increases if

A
Temperature is decreased

B
Solution constant is increased

C
Number of solute molecules is increased

D
Volume is increased

Question 8
1 / -0.25

Liquid 'M' and liquid 'N' form an ideal solution. The vapour pressures of pure liquids 'M' and 'N' are 450 and 700 mmHg, respectively, at the same temperature. Then correct statement is:
(x_M = Mole fraction of ‘M’ in solution;
x_N = Mole fraction of ‘N’ in solution;
y_M = Mole fraction of ‘M’ in vapour phase;
y_N = Mole fraction of ‘N’ in vapour phase)

A
\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} = \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

B
(x_M - y_M) < (x_N - y_N)

C
\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} < \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

D
\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} > \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

Question 9
1 / -0.25

A radiator of motor vehicle is filled with 8L of water containing 2L of ethylene glycol (density = 1.12 g ml^-1) .What is the lowest temperature at which the vehicle can be parked without the danger of getting water to freeze in the radiator. [K_f for water is 1.86 Km^-1]

A
-8.4°C

B
-23.2°C

C
-11.6°C

D
-4.2°C

Question 10
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When a substance is dissolved in a solvent the vapour pressure of the solvent is decreased. This results in

A
An increase in the b.p. of the solution

B
A decrease in the b.p. of the solvent

C
The solution having a higher osmotic pressure than the solvent

D
The solution having a lower osmotic pressure than the solvent

Submit Test

Solutions Test ...

Question 1

Depression in freezing point

freezing point

Boiling point

Melting point

Question 2

Moles of solute

Mole fraction of solvent

Moles of solvent

Mole fraction of solute

Question 3

Different boiling and different freezing point

Same boiling point but different freezing point

Same boiling point and same freezing point

Same freezing point but different boiling point

Question 4

A - IV, B - I, C - III, D - II

A - IV, B - II, C - I, D - III

A - II, B - I, C - IV, D - III

A - IV, B - III, C - II, D - I

Question 5

Suppressed at constant pressure and constant volume both

Increased at constant pressure and decreased at constant volume.

Decreased at constant pressure and increased at constant volume.

Not altered at both constant pressure and constant volume

Question 6

0.2 atm

0.15 atm

0.30 atm

0.6 atm

Question 7

Temperature is decreased

Solution constant is increased

Number of solute molecules is increased

Volume is increased

Question 8

\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} = \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

(xM - yM) < (xN - yN)

\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} < \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

\(\frac{{{{\rm{x}}_{\rm{M}}}}}{{{{\rm{x}}_{\rm{N}}}}} > \frac{{{{\rm{y}}_{\rm{M}}}}}{{{{\rm{y}}_{\rm{N}}}}}\)

Question 9

-8.4°C

-23.2°C

-11.6°C

-4.2°C

Question 10

An increase in the b.p. of the solution

A decrease in the b.p. of the solvent

The solution having a higher osmotic pressure than the solvent

The solution having a lower osmotic pressure than the solvent

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(x_M - y_M) < (x_N - y_N)