Question

The important conclusions on the formation of trihalomethanes are which of the following?

• A. Chlorination of natural waters causes the formation of chloroform and other trihalomethanes because of the reaction of $OC{l}^{-}$ on DOC present in the water
• B. Use of both ammonia and chlorine in water treatment has reduced the level of the trihalomethanes due to the formation of the chloroamines, which react more slowly than free chlorine
• C. Finally, the concentration of the trihalomethanes above 100$\mu$ g/l are considered unsafe for drinking water
• D. All of the above

Answer 1

The correct option is D All of the above

Chloroform, or trichloromethane, is an organic compound with formula $CH{Cl}_3$. It is a colorless, sweet-smelling, dense liquid.

Important conclusions on the formation of trihalomethanes are :

1. Chlorination of natural waters causes the formation of chloroform and other trihalomethanes because of the reaction of OCl−OCl− on DOC present in the water.

2.Use of both ammonia and chlorine in water treatment has reduced the level of the trihalomethanes due to the formation of the chloroamines, which react more slowly than free chlorine.

3.The concentration of the trihalomethanes above 100μμ g/l are considered unsafe for drinking water.