Q4Multiple choice
Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be __________.
- (i)rich in dissolved oxygen.
- (ii)poor in dissolved oxygen.
- (iii)highly polluted.
- (iv)not suitable for aquatic life.
Show answer
(i) rich in dissolved oxygen.