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# Test: Osmosis And Osmotic Pressure

## 10 Questions MCQ Test Chemistry Class 12 | Test: Osmosis And Osmotic Pressure

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This mock test of Test: Osmosis And Osmotic Pressure for Class 12 helps you for every Class 12 entrance exam. This contains 10 Multiple Choice Questions for Class 12 Test: Osmosis And Osmotic Pressure (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Osmosis And Osmotic Pressure quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Osmosis And Osmotic Pressure exercise for a better result in the exam. You can find other Test: Osmosis And Osmotic Pressure extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

### What is the osmotic pressure of a solution containing 3.42 g of cane sugar in 1litre solution at 27°C .Molar mass of cane sugar is 342 g.

Solution:

The correct answer is Option A.
Π = (W / M * V) * R * T
Π = (3.42 / 345 * 1 L) * 300 K * 0.0821
= 0.02463 atm

QUESTION: 2

### What is the effect of temperature on the osmotic pressure of solution?

Solution:

The correct answer is option D
Osmotic pressure is calculated as:
π = CRT
where, π = Osmotic pressure
C = Concentration
R = Gas constant
T = Temperature.
It is evident from the equation that osmotic pressure is directly proportional to the temperature.

QUESTION: 3

### Which of the following colligative property can provide molar mass of proteins ( or polymers or colloids) with greater precision?

Solution:

The correct answer is Option B.
Measurement of osmotic pressure provides a method to determine molar masses of solutes. This method is widely used to determine molar masses of proteins, polymers and other macromolecules.

QUESTION: 4

Equal volume of 1 M urea and 1 M glucose are mixed. the mixture will have

Solution:

The correct answer is option A
The mixture will have the same osmotic pressure as the two individual values.
πurea​=0.1×ST
πglucose​=0.1×ST
πmix​=(0.1ST+0.1ST) / 2​
=0.1ST

QUESTION: 5

The process of movement of solvent through a semipermeable membrane from the solution to the pure solvent by applying excess pressure on the solution side is called

Solution:

The correct answer is option D

The process of movement of solvent through a semipermeable membrane from the solution to the pure solvent by applying excess pressure on the solution side is called reverse osmosis.

QUESTION: 6

The osmotic pressure of one molar solution at 0°C is

Solution:
QUESTION: 7

Which one of the following processes is used for desalination of sea water ?

Solution:

The correct answer is Option C
Reverse osmosis also involves diffusion, making the process dependent on pressure, flow rate, and other conditions. Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other effluent materials from the water molecules.

QUESTION: 8

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

Solution:
QUESTION: 9

The phenomenon of flow of solvent molecules through a semi permeable membrane from pure solvent to solution is called

Solution:

The correct answer is Option B
Osmosis can be defined as the spontaneous movement of solvent molecules through a semipermeable membrane from a lower-concentration solution to a higher-concentration solution.

QUESTION: 10

What is the molar mass of the non-electrolyte if 2 g of it when dissolved in 100 mL of solution has osmotic pressure of 0.1 atm at 27 °C?

Solution:

The correct answer is option C
Osmotic pressure () = CRT =( W2 x R x T) / (M2 x V)
∴M2 = ( W2 x R x T) / ( x V)
= (2g x 0.082Latm/molk x 300k) /(0.1atm x 0.1L)
= 4920 g/mol
= 4.920 kg/ mol