Which of the following is not a technique or a step to convert normal water to potable water?

Bromination

The correct answer is option 1. Bromination.

Let us go through each option and understand its role in the conversion of normal water to potable water:

1. Filtration:

Role: Filtration is a common step in water treatment processes. It involves passing water through a physical barrier or medium to remove impurities, particles, and larger organisms.

Purpose:  Filtration helps in eliminating suspended solids, sediment, and larger contaminants from the water.

2. Bromination:

Role:  Bromination involves the addition of bromine or bromide compounds to water. It is a disinfection method similar to chlorination but using bromine.

Purpose: Bromination, like chlorination, aims to kill or inactivate harmful microorganisms present in the water, making it safe for consumption.

Note:  While bromination is a disinfection method, it is not as commonly used as chlorination in water treatment processes.

3. Boiling:

Role: Boiling is a simple and effective method to disinfect water by killing or inactivating pathogenic microorganisms, including bacteria, viruses, and parasites.

Purpose:  Boiling makes water safe for drinking by destroying harmful microorganisms that may cause waterborne diseases.

4. Chlorination:

Role:  Chlorination involves the addition of chlorine or chlorine compounds to water. It is a widely used method for disinfection in water treatment.

Purpose:  Chlorination helps kill or inactivate bacteria, viruses, and other pathogens present in water, making it safe for consumption. It is a common and effective method for large-scale water treatment.

Bromination is not as commonly used in the treatment of drinking water as chlorine or other disinfection methods. While bromine can be used for disinfection, it's less prevalent in traditional water treatment processes compared to chlorine. Chlorination and boiling are more commonly employed to make water potable.