JEE Main 2021 — Environmental Chemistry Question with Solution
From: JEE Main 2021 (Online) 1st September Evening Shift
Question
Water sample is called cleanest on the basis of which one of the BOD values given below :
Choose an option
Show full solutionCorrect option: C
Correct answer
C3 ppm
Step-by-step explanation
BOD is the biological oxygen demand. Cleanest water sample
will have BOD value equal to 3 ppm as clean water could
have BOD value of less than 5 ppm whereas highly polluted water could have BOD value of 17 ppm or more.
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This is a previous-year question from JEE Main 2021, covering the Environmental Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.