Solutions Test 5

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Solutions Test 5

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Weekly Quiz Competition

Question 1
1 / -0

The value for Henry’s constant for helium, hydrogen, nitrogen and oxygen at 293 K are 144.97 kbar, 69.16 kbar, 76.48 kbar and 34.86 kbar respectively. Which of the gas will be having maximum solubility?

A
Hydrogen

B
Oxygen

C
Helium

D
Nitrogen

Solution

The correct answer is option B
Greater the value of KH, lower is the solubility of gas at same partial pressure. As other gases have greater KH value, so it's less soluble than O2. So O2 is more soluble.
Question 2
1 / -0

A solution in which no more solute can be dissolved at a given temperature and pressure is called a saturated solution. At saturated solution stage equilibrium gets established among which two processes?

A
Dissolution and crystallisation

B
Dissolution and condensation

C
Sublimation and crystallisation

D
Evaporation and condensation

Solution

At saturated solution stage equilibrium gets established among dissolution and crystallisation.
Question 3
1 / -0

A solution in which no more solute can be dissolved at the given temperature and pressure is called a

A
Unsaturated solution

B
Dilute solution

C
Solid solution

D
Saturated solution

Solution

The correct answer is Option D.
In a saturated solution, more solute cannot be dissolved at a given temperature.
This is because, the solute dissolves in a solvent because of space between particles of solvent but on continuous addition of solute, the space between the solvent particles gets fulfilled. Thus no more solute particle can dissolve in a solvent.
Question 4
1 / -0

Which expression correctly represents Henry’s Law?

A

B

C

D

Solution

Henry's law states that at a constant temperature, the solubility of a gas is directly proportional to the pressure of a gas.
In other words, The partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution.
p = K_Hx
K_H is the henry's law constant.
Question 5
1 / -0

Value of Henry’s constant KH is _ _ _ _.

A
Increases with increase in temperature

B
Decreases with increase in temperature

C
Remains constant

D
First increases, then decreases

Solution

The correct answer is option A
According to Henry's law, solubility of a gas in a liquid is directly proportional to pressure of gas.
P αX
P=K_HX
P= Partial pressure of gas
X= solubility of gas in liquid
KH= Henry's constant
K_H depends only on the nature of gas, nature of liquid and temperature (T). As temperature increases, 'K_H' increases and 'X' decreases.
Question 6
1 / -0

Some solute particles in solution collide with other solid solute particles present and get separated out of solution. This process is known as

A
Condensation

B
Dissolution

C
Sublimation

D
Crystalisation

Solution

The correct answer is option D
Some solute particles in solution collide with the solid solute particles and get separated out of solution. This process is called crystallization. A stage is reached when the two processes take place at the same rate. Under such conditions, the number of solute particles going into solution will be equal to the solute particles separating out and a state of dynamic equilibrium is achieved.
Question 7
1 / -0

The value for Henry’s constant for argon, carbon dioxide, methane and vinyl chloride at 298 K are 40.3 kbar, 1.67 kbar, 0.413 kbar and 0.611 kbar respectively. Which of the gas will be having least solubility?

A
Argon

B
Vinyl chloride

C
Methane

D
Carbon dioxide

Solution

The correct answer is Option A.
Higher the value of Henry’s constant lower is the solubility of gas.
Question 8
1 / -0

Which of the following gases will be least soluble in water?

A
Hydrogen chloride

B
Sulphur dioxide

C
Ammonia

D
Nitrogen

Solution

The correct answer is Option D.
The reason for poor solubility of N2 in water is that they just occupy the intermolecular spaces and stay there by interaction with its surrounding molecules by weak van der Waals forces.So it is least soluble while other gases form hydrogen bonds with water.
Question 9
1 / -0

According to Henry’s Law at a constant temperature the solubility of gas in a liquid is directly proportional to the

A
Mass of gas

B
Density of gas

C
Volume of gas

D
Pressure of gas

Solution

The correct answer is option D
Henry's law states that at a constant temperature, the solubility of a gas is directly proportional to the pressure of the gas.
In other words, The partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution.
p=K_H x
Here, K_H is Henry's law constant.
Question 10
1 / -0

When a large amount of solute dissolves in a given amount of solvent it forms

A
dilute solution

B
saturated solution

C
aqueous solution

D
concentrated solution

Solution

‘k_H’ is the Henry’s law constant of the gas and its unit is atm.

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Solutions Test 5

Result

Solutions Test 5

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SHARING IS CARING

Question 1

Hydrogen

Oxygen

Helium

Nitrogen

Solution

Question 2

Dissolution and crystallisation

Dissolution and condensation

Sublimation and crystallisation

Evaporation and condensation

Solution

Question 3

Unsaturated solution

Dilute solution

Solid solution

Saturated solution

Solution

Question 4

Solution

Question 5

Increases with increase in temperature

Decreases with increase in temperature

Remains constant

First increases, then decreases

Solution

Question 6

Condensation

Dissolution

Sublimation

Crystalisation

Solution

Question 7

Argon

Vinyl chloride

Methane

Carbon dioxide

Solution

Question 8

Hydrogen chloride

Sulphur dioxide

Ammonia

Nitrogen

Solution

Question 9

Mass of gas

Density of gas

Volume of gas

Pressure of gas

Solution

Question 10

dilute solution

saturated solution

aqueous solution

concentrated solution

Solution

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