Environment & Ecology · Environmental Engineering
The Orthotolidine test is used to determine which parameter in water treatment?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Nitrogen in water
- 2Sulfates in water
- 3Residual chlorine in water✓
- 4Hardness of water
Correct answer
Residual chlorine in water
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