Question

Pure, clean and safe drinking water isn’t available easily these days. Growing population,

industrial development and environmental degradation are all causes for this. Given this

situation, it becomes even more important for us to be aware of purification techniques and

the available water purifiers in the market to ensure that our drinking water is of good quality.

A lot of minerals are found naturally in water and are important for the human body but

consuming an excess amount of it can cause many diseases. A good water purifier removes

the excess salts, suspended particles and microbes, and retains its essential vitamins and

minerals. With so many manufacturers in the water purification industry these days, it is

difficult to know which is good, which isn’t and which meets necessary standards. Both water

filters and water purifiers work on the same mechanical principle. They first suck up raw

water which is contaminated, filter out impurities ranging from sediments to micro-organisms

and then dispense clean water. However there is one big difference between the two – a

purifier can remove viruses and bacteria that filters cannot remove. Some purifiers use

chemicals and others use an electro-static charge to kill or capture viruses. One of the

earliest methods of water purification was to add chlorine in water. Chlorine releases

hydrochloric acid, which reacts with the microorganisms and kills them. However due to its

negative effect on health as well as its ineffectiveness to kill certain types of protozoa, o ?

Q5.How does chlorine purify water ? What is the negative effect of chlorine on health?​

Answer 1

Chlorine effectively kills a large variety of microbial waterborne pathogens, including those that can cause typhoid fever, dysentery, cholera and Legionnaires' disease.

Negative effect of Chlorine :-

Breathing high levels of chlorine causes fluid build-up in the lungs, a condition known as pulmonary edema. The development of pulmonary edema may be delayed for several hours after exposure to chlorine. Contact with compressed liquid chlorine may cause frostbite of the skin and eyes.