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Q: Which of the following is NOT dechlorinating agent?
  • A. Sulphur dioxide gas
  • B. Nitrogen dioxide gas
  • C. Activated carbon
  • D. Sodium thiosulphate
Correct Answer: Option B - Dechlorination is the process of removing residual chlorine from disinfected waste water prior to discharge into the environment. Example– (i) Sulphurdioxide (ii) Carbon (iii) Sodium metabisulfic (iv) Sodium bisulfate (v) Hydrogent peroxide • So Nitrogen dioxide gas is not dechlorinating agent.
B. Dechlorination is the process of removing residual chlorine from disinfected waste water prior to discharge into the environment. Example– (i) Sulphurdioxide (ii) Carbon (iii) Sodium metabisulfic (iv) Sodium bisulfate (v) Hydrogent peroxide • So Nitrogen dioxide gas is not dechlorinating agent.

Explanations:

Dechlorination is the process of removing residual chlorine from disinfected waste water prior to discharge into the environment. Example– (i) Sulphurdioxide (ii) Carbon (iii) Sodium metabisulfic (iv) Sodium bisulfate (v) Hydrogent peroxide • So Nitrogen dioxide gas is not dechlorinating agent.