Biology
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.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Waste Generation & Management
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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.
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Related Questions
Assertion (A): Incineration is the disposal of waste by dumping it in a pit.
Reason (R): Incineration is harmful as it releases fumes and harmful substances.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Electronic wastes do not contain any harmful substances or valuable materials.
Reason (R): Computers, mobile phones, batteries, etc. contain lead, cadmium, silver and copper.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Name the following :
(a) The solid precipitated material produced during secondary treatment of the effluent, carried out in the Effluent Treatment Plants.
(b) The two types of devices commonly used for removing the particulate air pollutants.
(c) The process of disposal of waste by burning.
(d) The solid waste residue left after burning.
(e) The category of wastes given out from homes.
Correct the following statements by changing the first/last word only.
(a) Some of the electronic wastes may contain valuable metals such as potassium.
(b) Sludge is the gaseous waste of cement industry.
(c) Drains are used to remove gaseous and particulate air pollutants.
(d) Industrial liquid waste is termed as sewage.
(e) Rags are the plant residue left after extracting the sugarcane juice.