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This question belongs to Civil Engineering Environmental Engineering

Environmental Engineering

?

Orthotolidine test is used for determination of

A) Dissolved oxygen B) Residual chlorine C) Biochemical oxygen demand D) Dose of coagulant

Answer & Solution

Correct Answer: Option B

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Question posted by Examveda

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1 Comment

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Rajesh Nandha 6 years ago

Orthotolodine test measure only total chlorine by color change to yellow. It doesn't measure free chlorine.
Only color wheel test and digital meter only measures free chlorine.but in the option instead of residual chlorine there should be total chlorine

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