Chemistry Class 11 Chapter Solutions and Colloids Important MCQs 2023
Chemistry Class 11
Solutions & Colloids
Important Multiple-Choice Questions
- 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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