Question

Match the following pollutants with their corresponding control methods.

Pollutants                         Control 
A) Particulate matter          I) Catalytic converter 
B) Carbon monoxide         II) Scrubber 
C) Sulphur dioxide            III) Incinerators 
D) Hospital wastes            IV) Electrostatic precipitator
 

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

Hint:

Electrostatic precipitators trap particulate matter, catalytic converters reduce carbon monoxide, scrubbers remove sulphur dioxide, and incinerators safely dispose of hospital wastes.

Answer 1

The Correct Option is B

Let’s match each pollutant with its appropriate control method by understanding the function of each control device and the nature of the pollutant. Particulate matter consists of tiny solid or liquid particles suspended in the air, like dust or soot, and is best controlled by an electrostatic precipitator, which uses electric charges to trap these particles—so A pairs with IV. Carbon monoxide, a harmful gas produced from incomplete combustion, can be converted into less harmful carbon dioxide using a catalytic converter, commonly used in vehicles—thus B pairs with I. Sulphur dioxide, another gas emitted from industrial processes, is effectively removed by a scrubber, which uses a liquid spray to capture the gas—hence C pairs with II. Finally, hospital wastes, which include biohazardous materials, are best managed by incinerators that burn the waste at high temperatures to safely dispose of it—so D pairs with III.

Matching Summary: A–IV (Particulate matter–Electrostatic precipitator), B–I (Carbon monoxide–Catalytic converter), C–II (Sulphur dioxide–Scrubber), D–III (Hospital wastes–Incinerators). Comparing with the options, this matches option (2).

Thus, the correct option is (2) A–IV, B–I, C–II, D–III.