How much concentration of chlorine is required for the sterilization of drinking water?

0.2-0.4 ppm

The correct answer is option 1. 0.2-0.4 ppm.

The correct concentration of chlorine required for the sterilization of drinking water is 0.2-0.4 ppm.

ppm (parts per million): This is a common unit used to measure the concentration of substances in water. For sterilizing drinking water, a chlorine concentration in the range of 0.2 to 0.4 ppm (parts per million) is typically sufficient to kill harmful microorganisms while being safe for human consumption. This level ensures effective disinfection without causing adverse health effects or an unpleasant taste.

Other Units:

0.2-0.4 mg: This refers to a specific amount (milligrams) rather than concentration. It does not specify the volume of water, making it an inappropriate measure for this context.

0.2-0.4 ppt (parts per thousand): This concentration is much higher than ppm and would be too concentrated for safe drinking water disinfection.

0.2-0.4 g (grams): This is an absolute amount and does not provide information about the concentration in a specific volume of water.

A chlorine concentration of 0.2-0.4 ppm is appropriate for the sterilization of drinking water. This level ensures effective disinfection while being safe for consumption.