Question

Match the column I with column II with respect to applications of properties of colloids in different fields and mark the appropriate choice.

Column I	Column II
(A) Coagulation	(i) Colloidal medicines
(B) Adsorption	(ii) Photographic films
(C) Electrophoresis	(iii) Sewage disposal
(D) Emulsions	(iv) Smoke precipitator

• A. (A) $\to$ (iii), (B) $\to$ (i), (C) $\to$ (ii), (D) $\to$ (iv)
• B. (A) $\to$ (ii), (B) $\to$ (iii), (C) $\to$ (i), (D) $\to$ (iv)
• C. (A) $\to$ (iii), (B) $\to$ (i), (C) $\to$ (iv), (D) $\to$ (ii)
• D. (A) $\to$ (i), (B) $\to$ (iv), (C) $\to$ (iii), (D) $\to$ (ii)

Answer 1

The correct option is C (A) $\to$ (iii), (B) $\to$ (i), (C) $\to$ (iv), (D) $\to$ (ii)

In water treatment, coagulation flocculation involves the addition of polymers that clump the small, destabilized particles together into larger aggregates so that they can be more easily separated from the water.

Medicines in colloidal form are easily absorbed by the body tissues and hence are more effective.

Electrostatic precipitators are highly efficient filtration devices that minimally impede the flow of gases through the device, and can easily remove fine particulate matter such as dust and smoke from the air stream.

Photographic emulsion. Photographic emulsion is a light-sensitive colloid used in film-based photography.