Chemistry Class 11 Chapter Solutions and Colloids Important MCQs 2023

Chemistry Class 11 Chapter Solutions and Colloids Important MCQs 2023

Chemistry Class 11

Solutions & Colloids

Solutions and Colloids
Solutions and Colloids

Important Multiple-Choice Questions

  1. In a single-phase system known as a solution, particles can’t be seen with:
  • Electron microscope
  • Ordinary microscope
  • Naked eyes
  • All of these

2) The following is the temperature at which two conjugate solutions combine (mix):

  • Critical temperature
  • Standard temperature
  • Transition temperature
  • Upper temperature

3) Pressure change can affect the solubility of

  • Gases
  • Solids
  • Liquids
  • All of these

4) The solubility of gases decreases with the increase in:

  • Volume
  • Pressure
  • Temperature
  • All of these

5) The dispersed particles of which system can’t pass through ordinary filter paper :

  • Colloids
  • Suspension
  • Solution
  • Alloy

6) The diameter of dispersed medium range from 10-2000 A0 in

  • colloids
  • suspension
  • solution
  • alloy

7) When the heat of the solution is positive , then solubility :

  • Increases with temperature fall
  • Increases with temperature rise
  • decreases with temperature rise
  • is independent of temperature

8) Mole fraction of a component of the solution is always:

  • less than one
  • equal to one
  • greater than one
  • not well defined

9) Solubility curve in the case of ionic solutes may be:

  • continuous
  • discontinuous
  • hyperbolic
  • both a & b

10) Concentration unit which is the most accurate and independent of temperature is:

  • % composition
  • Molarity (M)
  • Molality (m)
  • Normality (N)

11) The most convenient concentration unit which depends upon:

  • Molarity (M)
  • Molality (m)
  • Normality (N)
  • mole fraction(X)

12) According to the Raults’ law:

  • vapour pressure of the solution is directly proportional to the mole fraction of solvent
  • lowering of vapour pressure is directly proportional to the mole fraction of solute
  • Relative lowering of vapour pressure is equal to the mole fraction of solute
  • all of these

13) Passage of solvent molecules from a dilute solution into a concentrated solution is:

  • diffusion
  • Fluidity
  • osmosis
  • Reverse osmosis

14) Swelling of dead bones in water is due to :

  • Diffusion
  • Expansion
  • Osmosis
  • Decomposition

15) Osmotic pressure is independent of the nature of the membrane and directly proportional to the:

  • size of solute particles
  • shape of solute particles
  • concentration of the solution
  • surface tension of the solvent

16) A membrane that allows the solvent molecules to pass and not the solute particles is:

  • Animal membrane
  • Film of copper ferrocyanide
  • cellulose nitrate
  • all of these

17) Solvation of an ion increases with

  • decrease in charge and size
  • increase in charge and size
  • increase in charge and decrease in size
  • increase in size and decrease in charge

18) Colligative properties are the physical properties of dilute solutions, which mainly depends upon the:

  • size of solute particles
  • shape of solute particles
  • number of solute particles
  • chemical nature of solute particles

19) The addition of water to KMnO4 to water increases its:

  • Vapour pressure
  • Freezing point
  • Boiling point
  • All of these

20) The lowering of vapour pressure of pure solvent by the addition of non-volatile solute depends upon the nature of:

  • Solute
  • nature of Solvent
  • number of Solute Particles
  • Both b & c

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