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Match the following colloid types with the correct dispersed/dispersion medium combinations: List-I: (P) Hair cream, (Q) Foam rubber, (R) Cheese, (S) Paints List-II: (1) Gel, (2) Emulsion, (3) Sol, (4) Foam, (5) Solid sol

1. P -> 2; Q -> 5; R -> 1; S -> 3
2. P -> 2; Q -> 4; R -> 1; S -> 3
3. P -> 1; Q -> 4; R -> 2; S -> 5
4. P -> 1; Q -> 5; R -> 3; S -> 2

Correct answer: P -> 2; Q -> 4; R -> 1; S -> 3

Solution

Hair cream: liquid dispersed in liquid -> Emulsion (2). Foam rubber: gas dispersed in solid -> Solid foam (4). Cheese: liquid (water/fat) in solid protein network -> Gel (1). Paints: solid pigment in liquid medium -> Sol (3). Answer: P->2, Q->4, R->1, S->3.

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