Solutions Test

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Solutions Test - 28

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is incorrect ?

A
Relative lowering of vapour pressure is independent of the nature of the solute and the solvent.

B
The relative lowering of vapour pressure is a colligative property.

C
Vapour pressure of a solution is lower than the vapour pressure of the solvent.

D
The relative lowering of vapour pressure is directly proportional to the original pressure.
Question 2
4 / -1

If the various terms in the below given expressions have usual meanings, the van't Hoff factor (i) cannot be calculated by which one of the expressions ?

A

B

C

D
Question 3
4 / -1

You are given 100 cc of CCl₄ to extract iodine from 200 cc of its aqueous solution. For extracting maximum amount of iodine which one of the following processes would you adopt ?

A
use of 100 cc of CCl₄ once

B
use of 50 cc of CCl₄ twice

C
use of 10 cc of CCl₄ ten times

D
use of 25 cc of CCl₄ four times
Question 4
4 / -1

Solubility curve of Na₂SO₄ .10H₂O in water with temperature is given as

A
Solution process is exothermic

B
Solution process is exothermic till 34^oC and endothermic after 34^oC

C
Solution process is endothermic till 34^oC and exothermic thereafter

D
Solution process is endothermic
Question 5
4 / -1

If n₂ moles of solute are dissolved in n₁ moles of the solvent, Raoult’s law is expressed mathematically as

A

B

C

D

Solution
Question 6
4 / -1

Which of the following plots does not represent the behaviour of an ideal binary liquid solution?

A
Plot of p_A versus x_A (mole fraction of A in liquid phase) is linear

B
Plot of p_B versus x_B is linear

C
Plot of p_total versus x_A (or x_B) is linear

D
Plot of p_total versus x_A is non-linear.
Question 7
4 / -1

Which of the following is correct for a solution showing positive deviations from Raoult’s law?

A
∆ V = + Ve, ∆ H = + Ve

B
∆ V = ‒ Ve, ∆ H = ‒ Ve

C
∆ V = + Ve, ∆ H = ‒ Ve

D
∆ V = ‒ Ve, ∆ H = + Ve
Question 8
4 / -1

The diagram given below is a vapour pressure-composition diagram for a binary solution of A and B. In the solution, A-B interactions are

A
Similar to A-A and B-B interactions

B
greater than A-A and B-B interactions

C
Smaller than A-A and B-B interactions

D
Unpredictable
Question 9
4 / -1

A binary solution of ethanol and n-heptane is an example of

A
Ideal solution

B
Non-ideal solution with +ve deviation

C
Non-ideal solution with –ve deviation

D
Unpredictable behaviour
Question 10
4 / -1

Colligative properties of solutions are those which depend upon

A
the nature of the solvent

B
the nature of the solute

C
the number of solvent molecules

D
the number of solute particles