Civil Engineering - Water Supply Engineering - Discussion
Discussion Forum : Water Supply Engineering - Section 7 (Q.No. 23)
23.
By adding 1 ml of orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution
Discussion:
1 comments Page 1 of 1.
Anirban Roy said:
5 years ago
The color indicates the presence of residual chlorine. The deeper the yellow colour the greater is the concentration of residual chlorine.
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