Question

diluting a pollutant over and over until it is very difficult to detect is known as which of these processes?
nuclear reaction
oxidation reaction
serial dilution
evaporation

Explanation:

Serial dilution involves repeatedly diluting a substance, reducing its concentration until it becomes hard to detect. Nuclear reactions involve changes in atomic nuclei, oxidation reactions are about electron - transfer, and evaporation is about a liquid changing to a gas.

Answer:

serial dilution