Question

A scrubber in the exhaust of a chemical industrial plant removes:

• A. Gases like sulphur dioxide
• B. Particulate matter of the size 5 micrometre or above
• C. Gases like ozone and methane
• D. Particulate matter of the size 2.5 micrometer or less

Answer 1

The correct option is A Gases like sulphur dioxide

Scrubber systems are a diverse group of air pollution control devices that can be used to remove some particulates and/or gases from industrial exhaust streams. Chemical plants have chemical scrubbers, which is a gas scrubber, efficiently to remove gaseous pollutants like sulphur dioxide. Wet scrubbers can remove particulate matter.
Methane is emitted from natural sources such as wetlands, as well as human activities such as leakage from natural gas systems and the raising of livestock. Natural processes in soil and chemical reactions in the atmosphere help remove CH₄ from the atmosphere. Ozone is a gas in the atmosphere that protects everything living on the Earth from harmful ultraviolet (UV) rays from the Sun.