MCQs On Colloids Quiz

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Quizzes Created: 1 | Total Attempts: 7,719

Questions: 10 | Attempts: 7,719 | Updated: Jul 10, 2023

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Play our simple quiz on Colloid lessons that you have studied in your chemistry textbooks. This test contains only multiple-choice based questions related to colloidal dispersion or colloids. So, take up this quiz and test your knowledge for the same. Colloids, also known as colloidal solutions, are mixtures in which one substance is suspended with another substance. Learn more about the colloidal system with the quiz given below. Also, it would check how strong your chemistry is.

Questions and Answers

1.

One of following substances that belongs to colloid system is....
- A.
  
  Milk
- B.
  
  Accu water
- C.
  
  Vinegar
- D.
  
  Blood
Correct Answer
A. Milk

Explanation
Milk is a colloid system because it consists of small particles of fat and protein dispersed in water. Colloids are a type of mixture where the particles are larger than those in a solution but smaller than those in a suspension. In milk, the fat and protein particles are evenly distributed throughout the liquid, creating a stable colloid system.

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2.

Dispersed phase and dispersing medium of smoke are..
- A.
  
  Solid in liquid
- B.
  
  Liquid in solid
- C.
  
  Solid in gas
- D.
  
  Gas in solid
Correct Answer
C. Solid in gas

Explanation
The correct answer is solid in gas because smoke is made up of tiny solid particles suspended in a gas medium. When a material burns or undergoes combustion, it produces smoke, which consists of solid particles such as ash, soot, or dust, that are dispersed in the air. Therefore, the dispersed phase is solid particles, and the dispersing medium is the gas in which these particles are suspended.

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7
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3.

Margarine is a colloid system of...
- A.
  
  Foam
- B.
  
  Emulsion
- C.
  
  Aerosol
- D.
  
  Solid emulsion
Correct Answer
D. Solid emulsion

Explanation
Margarine is a solid emulsion because it is a mixture of water and oil, where water is dispersed as tiny droplets in the oil phase. Emulsions are colloidal systems in which one liquid is dispersed as small droplets in another immiscible liquid. In the case of margarine, the water droplets are dispersed in the oil phase to create a stable solid emulsion.

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4.

Light scattering in colloid system is known as...
- A.
  
  Brownian Motion
- B.
  
  Tyndall Effect
- C.
  
  Coagulation
- D.
  
  Electrophoresis
Correct Answer
B. Tyndall Effect

Explanation
The Tyndall Effect refers to the phenomenon of light scattering in a colloid system. When a beam of light passes through a colloid, the particles in the colloid scatter the light, making the beam visible. This effect is caused by the difference in refractive index between the dispersed phase and the continuous phase of the colloid. The dispersed particles in the colloid are larger than the wavelength of visible light, causing the scattering of light. This effect is commonly observed in everyday situations, such as the visibility of dust particles in a beam of sunlight or the blue color of the sky.

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3
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5.

These following things are colloid properties, except...
- A.
  
  Composed of 2 phase
- B.
  
  Stable
- C.
  
  Homogeneous
- D.
  
  Can be filtered
Correct Answer
C. Homogeneous

Explanation
Colloids are heterogeneous mixtures, meaning they consist of two or more phases. They are stable, meaning the particles do not settle out over time. Colloids are also known to be able to pass through filters, as the particles are small enough to pass through the filter medium. However, colloids are not homogeneous, as they do not have a uniform composition throughout.

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4
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6.

The suspended particles range from ______ to _____ nanometres in size.
- A.
  
  1 to 10
- B.
  
  1 to 100
- C.
  
  1 to 1000
- D.
  
  10 to 1000
Correct Answer
C. 1 to 1000

Explanation
The suspended particles can range in size from as small as 1 nanometer to as large as 1000 nanometers.

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4
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7.

Which one of the following is an aerosol?
- A.
  
  Milk
- B.
  
  Smoke
- C.
  
  Cheese
- D.
  
  Butter
Correct Answer
B. Smoke

Explanation
Smoke is considered an aerosol because it is a suspension of solid or liquid particles in a gas. In the case of smoke, it is composed of small particles of carbon, ash, and other substances suspended in air. These particles can be inhaled and can have harmful effects on the respiratory system. Therefore, smoke is classified as an aerosol.

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1
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8.

Colloidal solution finds application in:
- A.
  
  Crystallography
- B.
  
  Milk industries
- C.
  
  Textiles
- D.
  
  Chromatic chemical industries
Correct Answer
B. Milk industries

Explanation
Colloidal solutions are widely used in milk industries. Milk is an example of a colloidal solution, where fat globules are dispersed in a liquid medium. Colloidal stability is crucial in milk production, as it prevents the separation of fat from the liquid portion. Additionally, colloidal properties such as suspension and emulsion formation are important in the production of various dairy products like cheese, butter, and ice cream. Therefore, the use of colloidal solutions is significant in milk industries for the processing and production of dairy products.

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9.

Which of the following form of colloid is considered to be the strongest colloid?
- A.
  
  Solid sol
- B.
  
  Liquid sol
- C.
  
  Gel
- D.
  
  Foam
Correct Answer
A. Solid sol

Explanation
Solid sol is considered to be the strongest colloid because it consists of solid particles dispersed in a liquid or gas medium. The solid particles in a solid sol are usually very small and evenly distributed, resulting in a stable and strong colloid. This type of colloid exhibits high viscosity and is resistant to settling or separation. Solid sols are commonly used in various industries, such as in the manufacturing of paints, ceramics, and pharmaceuticals.

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10.

Which is dispersing medium for Emulsion?
- A.
  
  Liquid
- B.
  
  Solid
- C.
  
  Gas
- D.
  
  All of these
Correct Answer
A. Liquid

Explanation
Emulsion is a mixture of two immiscible liquids, where one is dispersed as tiny droplets in the other. The dispersing medium is the continuous phase in which the other liquid is dispersed. In the case of emulsion, the liquid acts as the dispersing medium. Therefore, the correct answer is liquid.

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Current Version
Jul 10, 2023

Quiz Edited by
ProProfs Editorial Team
Jun 15, 2010

Quiz Created by
Minuluprat

MCQs On Colloids Quiz

One of following substances that belongs to colloid system is....

Dispersed phase and dispersing medium of smoke are..

Margarine is a colloid system of...

Light scattering in colloid system is known as...

These following things are colloid properties, except...

The suspended particles range from ______ to _____ nanometres in size.

Which one of the following is an aerosol?

Colloidal solution finds application in:

Which of the following form of colloid is considered to be the strongest colloid?

Which is dispersing medium for Emulsion?

The suspended particles range from __ to _ nanometres in size.