Home » Chemistry mcqs » In the trickling filter process, the _________ build up and they block the passageIn the trickling filter process, the _________ build up and they block the passage by a) Sludge formed b) Dissolved impurities c) Dissolved solids d) Micro organisms Related Posts:Sperms are _________ in origin.The arrangement of _________ speaks of the division…Deoxygenated blood first enters in _________ part in fishes?
