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suspended particulate matter (SPM)

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Solution

Suspended particulate matter (SPM) are finely divided solids or liquids that may be suspended in the air as a result of combustion processes, industrial activities or natural sources.
This complex mixture includes both organic and inorganic particles, such as dust, pollen, soot, smoke, and liquid droplets.

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Q. Which statement/s is/are true about Suspended Particulate Matter (SPM)?

Question 14
Name any two sources which cause air pollution due to suspended particulate matter (SPM).

Q. Assertion : Suspended particulate matter (SPM) is an important pollutant released by diesel vehicles.
Reason : Catalytic converters greatly reduce pollution caused by automobiles.

Q. Read the following statements regarding particulate matter and select the incorrect ones.
(i) Particulate matter (PM) consists of soot, fly ash, dust, spores, pollen grains, etc.
(ii) Particulate matter is differentiated into settle able (larger than

10

remaining in air for more than one day to several weeks) particulate matter.
(iii) SPM (suspended particulate matter) consists of aerosol, dust and mist.
(iv) Particulate matter causes respiratory diseases such as tuberculosis, allergy and many more diseases in animals and plants.
(v) According to Central Pollution Control Board (CPCB), particulate size of

2.5

or less in diameter are responsible for causing the greatest harm to human health.

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Suspended particulate matter (SPM) is a major pollutant released by diesel vehicles.
Reason [R]: Catalytic converters greatly reduce pollution caused by automobiles.

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