Question

Given below are two statements: one is labelled as $\text{Assertion A}$ and the other is labelled as $\text{Reason R}$.

$\text{Assertion A:}$ Polluted water may have a value of BOD of the order of $17$ ppm.

$\text{Reason R:}$ BOD is a measure of oxygen required to oxidise both the bio-degradable and non-biodegradable organic material in water.

In the light of the above statements, choose the most appropriate answer from the options given below.

Answer 1

Highly polluted water could have a BOD value of $17$ ppm or more.
The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called Biochemical Oxygen Demand (BOD).
Hence, A is correct but R is not correct.