Question

A sample of pond water containing 20mg of
organic matter requires 16mg of dissolved
oxygen. Pond water contains 10mg of organic
matter per 2 litres. It's BOD is
1) 4000ppm
2) 400ppm
3) 4 ppm
4) 40ppm
guys plz ans this with clarity solution​

Answer 1

Answer:

THE ANSWER IS

4PPM

HOPE IT HELP

Answer 2

sis rehan delect cheyadam ledhu someone delecting it