BOD values of 4 water samples A, B, C, D are 60, 80, 100 and 150 mg/lit respectively. Which is more polluted

The COD values of three water samples A,B and C are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A,B and C, but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted ? Can you assign the correct label to each assuming the river water is relatively clean ?

The amount of oxygen used by the suitable microorganisms present in water during five days at 20^(@)C is called as BOD. For pure water BOD is about 1 ppm fairly pure water 3 ppm and doubtful purity 5 ppm the municipal sewage has BOD values 100-4000 ppm. BOD= Number of moles of O_2 required / Number of liters of water sample The BOD values of three water sample x,y and z are 5 mg/litre, 16 mg/Litre and 400 mg/Litre respectively the more polluted sample of water is

Dissolved oxygen values of four water samples A, B, C and D are respectively 6 ppm, 5ppm, 1ppm and 3ppm. Which is polluted ?

Dissolved oxygen values of four water samples A, B, C and D are respectively 1 ppm, 3ppm, 5 ppm and 7 ppm. Which is more polluted ?

Dissolved oxygen values of four water samples A, B, C and D are respectively 6 ppm, 5 ppm, 1 ppm and 3 ppm. Which is more polluted?

Three samples of water A,B and C have the D.O. values 1mg/l , 3mg/l , and 5 mg/l respectively . The more polluted sample of water is