Colloids
Trending Questions
During an experiment, the students were asked to prepare a (Mass/Mass) solution of sugar in water. Ramesh dissolved of sugar in of water while Sarika prepared it by dissolving of sugar in water to make of the solution.
(a) Are the two solutions of the same concentration
(b) Compare the mass % of the two solutions.
When dispersed phase is liquid and dispersion medium is gas, then the colloidal system is called?
Smoke
Clouds
Emulsion
Jellies
- gas in gas
- liquid in gas
- solid in gas
- gas in liquid
Name the principle on which the jet plane works.
Most paints are:
Sols
Gels
Suspensions
Emulsions
Fractional distillation is used when the difference in the boiling points of two liquids in a mixture is _______.
The dispersed phase and dispersion medium of fog respectively are?
Solid, liquid
Liquid, liquid
Liquid, gas
Gas, liquid
Write three properties of suspension.
- Suspension > colloid > solution
- Suspension > solution > colloid
- Solution > suspension > colloid
- Solution > colloid > suspension
What are the physical states of dispersed phase and dispersion medium of a cloud?
We study colloids as part of surface phenomena because
Colloids are a heterogeneous system in which phase boundaries exist
Colloids are homogenous
Colloids have a large surface area and this gives rise to residual forces which are characteristic of such boundaries
All of the above
- Aerosols, Dispersed phase, Dispersion medium
- Aerosol, Dispersion medium, Dispersed phase
- Sols, Dispersed phase, Dispersion medium
- Sols, Dispersion medium, Dispersed phase
Colloids, Suspension, True solution
- True solution > Colloids > Suspension
- True solution> Suspension > Colloids
- Suspension > True solution > Colloids
- Suspension > Colloids > True solution
1. The particle size is around 10−7 m.
2. The constituent particles cannot be separated by filtration.
3. When a laser beam is passed through it, it clearly shows the path of the laser beam.
Which amongst the following shows the given properties?
- Blood
- Copper wire
- Salt solution
- Hydrogen balloon
A centrifuge is used to separate a heavier component from a lighter one.
- True
- False
Name the apparatus that is used to carry out centrifugation.
a. Salt solution
b. Milk
c. Copper sulphate solution
d. Starch solution
Centrifugation is used in those cases where filtration does not work due to the smaller size of soild particles
- True
- False
______________ method is used to separate substances based on their different densities.
To every action, there is an ___________ and _____________ reaction.
Which of the following is correct based on the result of centrifugation of the sample milk?
- Top layer - Skim milk
Middle layer - Milk fat
Bottom layer - Skim milk - Top layer - Skim milk
Bottom layer - Milk fat - Top layer - Milk fat
Middle layer - Skim milk
Bottom layer - Milk fat - Top layer - Milk fat
Bottom layer - Skim milk
- Crystallization
- Chromatography
- Filtration
If the earth attracts a body with a force of , then what force is exerted on the earth by the body?
i)colloid. [1 Marks]
ii)Dispersion medium and dispersed phase. [1 Marks]
b)Identify the dispersed phase and dispersing medium in the following colloids. [1 Mark]
i) Fog
ii) Cheese
c)Define tyndall effect. [1 Mark]
1. Milk in water
2. Salt in water
3. Flour in water
- 1 > 2 > 3
- 2 > 3 > 1
- 3 > 2 > 1
- 3 > 1 > 2
- the cream and milk have equal weight
- the cream sinks in the milk
- the cream is heavier than milk
- the cream is lighter than milk
What are the physical states of dispersed phase and dispersion medium of a fog?
centrifugation can be used only if one of the components of a mixture is heavier than the other. Give reasson