Question

Chemical is used for disinfecting drinking water to make it free from germs its chemical formula is * 1 point CaOCl CaOCl2 CaOCl3 CaOCl4​

Answer 1

Answer:

Chlorine is used to make drinking water free from germs.

(ii) Sodium bicarbonate (IUPAC name: sodium hydrogen carbonate) is a chemical compound with the formula NaHCO

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. It is a salt composed of sodium ions and bicarbonate ions. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.

(iii) Hard water contains dissolved magnesium and calcium ions. These make it more difficult for the water to form a lather with soap. Temporary hardness is caused by dissolved calcium hydrogencarbonate (which is removed by boiling). Permanent hardness is caused by dissolved calcium sulfate (which is not removed by boiling). Water can be softened using washing soda or an ion-exchange resin.

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Answer 2

Ca(OCl)2 is the chemical used for disinfecting drinking water.

1. Calcium hypochlorite in dry form is used in treatment process of drinking water.
2. The compound on dissolving releases free chlorine which is harmful for microbes thus eliminating them, with action specifically over bacteria and viruses.
3. It acts on microbes by damaging it's cell membrane. It subsequently enters the cell and inhibits respiration or damages DNA.
4. Other forms of chlorine used are sodium hypochlorite and chlorine gas.