Question

Match the following

List – I

(Dispersed Phase – Dispersion medium)

A) Solid – Liquid

B) Liquid – Liquid

C) Solid – Gas

D) Liquid – Solid

List – II

(Type of colloid)

I) Gel

II) Aerosol

III) Sol

IV) Emulsion

The correct answer is

• A. A - II, B - III, C - I, D - IV
• B. A - III, B - IV, C - II, D - I
• C. A - III, B - IV, C - I, D - II
• D. A - I, B - III, C - IV, D - II

Hint:

Types of Colloidal Systems:

• Sol: Solid in liquid
• Emulsion: Liquid in liquid
• Aerosol: Solid/Liquid in gas
• Gel: Liquid in solid

Answer 1

The Correct Option is B

To match the type of colloid with the phase combination, we need to know the characteristics of each colloid:

• Sol (A-III): A sol is a colloidal system in which the dispersed phase is a solid and the dispersion medium is a liquid. Example: Paint, ink, etc.
• Emulsion (B-IV): An emulsion is formed when both dispersed and dispersion phases are liquids. These are immiscible liquids forming a stable colloidal system, such as milk (fat in water).
• Aerosol (C-II): Aerosols are formed when solids or liquids are dispersed in a gas. For this option, solid in gas means smoke or dust in air.
• Gel (D-I): A gel is a colloidal system in which the dispersed phase is liquid and the dispersion medium is solid. Common examples include jelly or butter.

Thus, correct matching is: \[ \text{A-III (Sol), B-IV (Emulsion), C-II (Aerosol), D-I (Gel)} \]

Answer 2

Step 1: Understanding the terms
In colloids, the dispersed phase is the substance present in the form of small particles, and the dispersion medium is the substance in which the particles are dispersed.

Step 2: Matching List – I and List – II
A) Solid dispersed in Liquid → This forms a Sol (solid particles dispersed in liquid). Example: paint, blood.
B) Liquid dispersed in Liquid → This forms an Emulsion. Example: milk, butter.
C) Solid dispersed in Gas → This forms an Aerosol. Example: smoke, dust.
D) Liquid dispersed in Solid → This forms a Gel. Example: jelly, cheese.

Step 3: Conclusion
Therefore, the correct matching is:
A - III (Solid – Liquid = Sol)
B - IV (Liquid – Liquid = Emulsion)
C - II (Solid – Gas = Aerosol)
D - I (Liquid – Solid = Gel)