Question

9) Size of particular matter in air is measured in
Macro meter
Micrometer
Millimeter
PM
had to​

Answer 1

Answer:

Micrometre

Explanation:

Particulate matter is the sum of all solid and liquid particles suspended in air many of which are hazardous. This complex mixture includes both organic and inorganic particles, such as dust, pollen, soot, smoke, and liquid droplets.

Answer 2

Answer:

Micrometer is the correct ans