Civil Engineering - UPSC Civil Service Exam Questions - Discussion

4. 

BOD is preferred to COD as an index of sewage concentration because

[A]. BOD represents both carbonaceous and nitrogenous organic matter while COD may indicate carbonaceous matter only
[B]. BOD test is easier to perform and gives more reliable result
[C]. BOD relates specifically to putrescible organic matter which is the most objectionable sewage constituent
[D]. COD relates to the impurities which can only removed by chemical treatment which is expensive

Answer: Option B

Explanation:

No answer description available for this question.

Roy said: (Jul 19, 2017)  
I think it should be C.

Shiva said: (Sep 22, 2017)  
Yes, it's option C.

Dolly said: (Apr 3, 2018)  
It's c. I also agree.

Tinku Tastogi said: (Jun 15, 2019)  
I too agree. It's C.

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