Question

short note on PM-2.5 and PM-10​

Answer 1

is it prime meridian

Answer 2

PM10 is particulate matter 10 micrometers or less in diameter, PM2.5 is particulate matter 2.5 micrometers or less in diameter. PM2.5 is generally described as fine particles. By way of comparison, a human hair is about 100 micrometres, so roughly 40 fine particles could be placed on its width.

PM10 and PM2.5 are not used for any application.

Substance details

Substance name: Particulate matter (less than 10 micrometers in diameter or less than 2.5micrometres in diameter)

Synonyms: dust, particulate matter, inhalable particles, respirable particles, smoke, mist

Physical properties

Particles of any substances that are less than 10 or 2.5 micrometres diameter. Particles in this size range make up a large proportion of dust that can be drawn deep into the lungs. Larger particles tend to be trapped in the nose, mouth or throat.

Chemical properties

The chemical properties vary depending on sources of particles. It is important to note that particulates are not one particular chemical substance but a classification of particles by size rather then chemical properties.

Hope it helps!!☺️