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JEE Main 20211 SeptemberEvening Shift

Exam: JEE Main
Year: 2021
Date: 1 September
Shift: Evening Shift
Subject: Chemistry
Chapter: Environmental Chemistry

JEE Main 2021 · 1 September · Evening Shift · Chemistry · Environmental Chemistry

Water sample is called cleanest on the basis of which one of the...

Water sample is called cleanest on the basis of which one of the

BOD

values given below :

Options

A $11ppm$
B $15ppm$
C $3ppm$
D $21ppm$

Correct answer

C. $3ppm$

Step-by-step solution

Clean water would have

BOD

value of less than

5ppm

whereas highly polluted water could have a

BOD

value of

17ppm

or more.

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