If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Microbes in Human Welfare (Class 12) — quick quiz

5 real MHT-CET questions on Microbes in Human Welfare (Class 12). Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 3

MEDIUM

In sewage treatment, the biological oxygen demand (BOD) refers to: