Solutions Test

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Solutions Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Where will the amount of dissolved oxygen be more, in a mountain lake at 10,000 ft at 50^oF or in a lake near sea level at 50^oF?

A
In a lake near sea level

B
Amount of dissolved oxygen is same in a mountain lake and in a lake near sea level

C
In a mountain lake

D
Cannot be predicted

Solution

At higher altitude pressure is low. Lower is the pressure lower is the solubility of gas. Since a mountain lake is at higher altitude solubility is less as compared to lake at sea level.
Question 2
1 / -0

To increase the solubility of carbon dioxide in soft drinks, bottle is sealed under high pressure.This concept is based on which law?

A
Henry's law

B
Boyle's law

C
Charle's law

D
Avogadro's law

Solution

To increase the solubility of carbon dioxide in soft drinks, bottle is sealed under high pressure.This concept is explained on basis of Henry's law.
Question 3
1 / -0

Properties of solution which depend on only number of solute particles but not on nature of solute are called

A
Chemical properties

B
Physico-chemical properties

C
Colligative properties

D
Unique properties

Solution

Properties of solution which depend on only number of solute particles but not on nature of solute are called colligative properties.
Question 4
1 / -0

On lowering of temperature of solution, the rate of osmosis decreases because

A
The rate of transfer of particle across semi permeable membrane decreases.

B
The solute undergoes either dissociation or association

C
The viscosity of solvent increases.

D
The velocity of solvent particles increases

Solution

It decreases, because p α T
Question 5
1 / -0

Molarity of liquid HCl if density of solution is 1.17 g/mL

A
32.05 M

B
42.10 M

C
18.25 M

D
36.5 M

Solution

Number of Moles = 1.17/36.5=0.03205

Molarity = 0.03205 × 1000

= 32.05 M
Question 6
1 / -0

A non ideal solution is prepared by mixing 30mL chloroform and 50 mL of acetone. The volume of the mixture is.

A
80 mL

B
≤80 mL

C
<80 mL

D
>80 mL

Solution

Because of hydrogen bonding there will be an increase in forces of attraction in the solution eventually the molecules will be held more tightly. Therefore there will be decrease in volume of solution on mixing.
Question 7
1 / -0

Lowering of vapour pressure is highest for

A
0.1M MgSO₄

B
0.1M Urea

C
0.1M BaCl₂

D
0.1M Ethanol

Solution

Barium Chloride on dissociation gives 2 moles of Chloride ions and one mole of Barium ions so the total number of moles of ions in solution is 2+1=3.0, Higher is the van't Hoff factor greater will be the lowering of vapour pressure.
Question 8
1 / -0

Which of the following statements regarding effect of temperature on solubility of solutes like NaNO₃, NH₄Cl etc in water is true?

A
Decreases with increase in temperature

B
Solubility depends on pressure

C
Increases with increase in temperature

D
No effect of temperature on solubility

Solution

Solubility of the solutes increases with increase in temperature for those solutes whose dissolution process is endothermic.
Question 9
1 / -0

van't Hoff factor for 1M ideal solution is

A
0.2

B
0.01

C
0.1

D
1.0

Solution

Since it is an ideal solution the solute neither dissociates nor associates and i = 1.0
Question 10
1 / -0

The mass of sodium chloride in 2.5 M solution is

A
58.50 g

B
117 .00g

C
37.80 g

D
146.25 g

Solution

For preparing one molar solution we are required to dissolve one mole of the NaCl ( 58.5g) , for 2.5 mol we require 2.5 x 58.5= 146.25 g

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Solutions Test - 3

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Solutions Test - 3

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Question 1

In a lake near sea level

Amount of dissolved oxygen is same in a mountain lake and in a lake near sea level

In a mountain lake

Cannot be predicted

Solution

Question 2

Henry's law

Boyle's law

Charle's law

Avogadro's law

Solution

Question 3

Chemical properties

Physico-chemical properties

Colligative properties

Unique properties

Solution

Question 4

The rate of transfer of particle across semi permeable membrane decreases.

The solute undergoes either dissociation or association

The viscosity of solvent increases.

The velocity of solvent particles increases

Solution

Question 5

32.05 M

42.10 M

18.25 M

36.5 M

Solution

Question 6

80 mL

≤80 mL

<80 mL

>80 mL

Solution

Question 7

0.1M MgSO4

0.1M Urea

0.1M BaCl2

0.1M Ethanol

Solution

Question 8

Decreases with increase in temperature

Solubility depends on pressure

Increases with increase in temperature

No effect of temperature on solubility

Solution

Question 9

0.2

0.01

0.1

1.0

Solution

Question 10

58.50 g

117 .00g

37.80 g

146.25 g

Solution

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0.1M MgSO₄

0.1M BaCl₂