Chlorination of water may be harmful if the water contains_________________?

Related Mcqs:

Three elements needed for the healthy growth of plants are_________________?

A. N P K B. N K C C. N S P D. N Ca P...

Residence time of methane in the atmosphere is___________________?

A. 3 – 7 days B. 2 -3 days C. 3 – 7 years D. 2 – 3 years...

Which of the following is not a heavy industry ?

A. iron B. fertilizer C. paper D. none...

Requirement of macronutrient per acre of the land is_________________?

A. 5 to 200 kg B. 20-200 kg C. 200-400 kg D. 30-400 kg...

Which of the following is not a secondary pollutant_________________?

A. ozone B. carbonic acid C. sulphuric acid D. carbon dioxide...