JEE Main202131 Aug 2021Morning ShiftChemistryEnvironmental ChemistryActual
BOD values (in ppm ) for clean water (A) and polluted water (B) are expected respectively as:
Options
- AA < 5 ,   B > 17
- BA > 50 ,   B < 27
- CA > 15 ,   B > 47
- DA > 25 ,   B < 17
Correct answer
A. A < 5 ,   B > 17
Step-by-step solution
Clean water would have BOD a value of less than, 5   ppm whereas highly polluted water could have a BOD value of 17   ppm or more.