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ICSE Class 9 Biology Question 1 of 6

Waste Generation and Management — Question 5

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Question 2(v)

Assertion (A): Electrostatic precipitators remove gaseous air pollutants by attracting them to electrically charged plates.

Reason (R): The electrostatic precipitators can remove upto 90% of particulate matter from thermal plants.

  1. A is True and R is False.
  2. A is False and R is True.
  3. Both A and R are True.
  4. Both A and R are False.
Answer

A is False and R is True.

Reason — Electrostatic precipitators are designed to remove particulate matter (like dust, ash, and soot), not gaseous pollutants.
Electrostatic precipitators are highly efficient and can remove up to 90–99% of particulate matter, depending on their design and maintenance. This helps reduce harmful emissions and improve air quality.