Civil Engineering - UPSC Civil Service Exam Questions - Discussion

34. 

In the plot of residual chlorine versus chlorine dose applied shown in the above figure, the curve will not have any (0, 0) point because

[A]. of experimental error
[B]. chlorine escapes into the atmosphere
[C]. chlorine requires some contact time
[D]. chlorine is consumed for disinfection

Answer: Option C

Explanation:

No answer description available for this question.

Vivek said: (Apr 19, 2018)  
It must be D.

Basu said: (Jul 24, 2018)  
It should be option D.

Umesh Jit said: (Sep 17, 2018)  
Yes, it's D.

Neeraj said: (Jan 4, 2021)  
Because cl2 gets consumed to oxidise fe2+ n mn2+ into fe2o3 n mno2 in early region.

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