Given below are two | Environmental Chemistry| JEE-MAIN 2022

JEE MAIN 2022

25-06-2022 S2

Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Polluted water may have a value of BOD of the order of 17 ppm.
Reason R: BOD is a measure of oxygen required to oxidise both the biodegradable and nonbiodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer from the options given below.

Select the correct option:

Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is NOT the correct explanation of A

A is correct but R is not correct

A is not correct but R is correct

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Clean water have BOD less than 5 ppm while highly polluted water has BOD greater or equal to 17 ppm. So, assertion is correct. BOD is measure of oxygen required to oxidise only bio-degradable organic matter. So, reason is false.

Question Tags

JEE Main

Chemistry

Easy

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