Which of the following gas/es is/are used to disinfect water... — General Awareness 2018

Question 88 General Awareness 2018 Medium MCQ +4.00 marks · -1.00 negative

Which of the following gas/es is/are used to disinfect water in sewage treatment facilities?

A. Ozone B. Chlorine C. Nitrogen D. Ozone and chlorine

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