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Which of the following is not used for disinfection of drinking water -
A
Chlorine
B
Phenyl
C
Chloramine
D
Ozone
Detailed Solution
Disinfection is the destruction of disease-causing micro-organisms in water.
Chlorine is the most commonly used disinfectant for drinking water; it kills bacteria and other pathogens.
Chloramines (formed from chlorine and ammonia) are used because they give a longer lasting disinfection.
Ozone is a powerful oxidising agent and is also used to disinfect drinking water.
Phenyl (phenol-based disinfectant) is used for cleaning floors and toilets. It is toxic and gives an unpleasant taste and smell, so it is never used for disinfecting drinking water.
So the one not used is phenyl.
Chlorine is the most commonly used disinfectant for drinking water; it kills bacteria and other pathogens.
Chloramines (formed from chlorine and ammonia) are used because they give a longer lasting disinfection.
Ozone is a powerful oxidising agent and is also used to disinfect drinking water.
Phenyl (phenol-based disinfectant) is used for cleaning floors and toilets. It is toxic and gives an unpleasant taste and smell, so it is never used for disinfecting drinking water.
So the one not used is phenyl.