Question

What is the size range of atmospheric particulate matter?

(a) 0.1 – 10 microns

(b) 0.1 – 1 micron

(c) 1 – 10 microns

(d) 10 – 100 microns

The question was asked in an online quiz.

Question is taken from Particulates topic in section Particulates, Acid Rain & Aerosols of Environmental Engineering

Answer 1

Right option is (a) 0.1 – 10 microns

The explanation is: Atmospheric particulate matter comprises of particles of sizes in the range of 0.1 – 10 micrometres.