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Bleaching powder is correctly represented as
A. $CaOC{{l}_{2}}$ ​
B. $CaO$
C. $CaOCl$
D. $Ca(OCl)Cl$

Answer
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Hint: Bleaching powder is actually a basic compound. Chlorine is highly used as a bleaching agent, sterilisation and preparation of antiseptic. The nascent oxygen prepared by chlorine in presence of moisture helps in the bleaching.

Complete Step by Step Answer:
Chlorine is a halogen element.
The chemical formula of bleaching powder is $Ca(OCl)Cl$ . Thus bleaching powder contains chlorine atoms and calcium atoms. So, chlorine is widely used as a bleaching agent.
Thus we can write that the bleaching powder is correctly represented as $Ca(OCl)Cl$.
Thus the correct option is D.

Additional information: Bleaching powder contains calcium and chlorine as major elements along with oxygen atoms. The uses of bleaching powder are as follows:
- Bleaching powder is used to kill bacteria.
- It is highly used to clean many areas, drain etc as it kills the bacteria, virus, mosquito, fly etc which causes many harmful diseases.
- It is also used as a bleaching agent. It is highly basic and reacts with acid to form salt.

Note: Chlorine is a group 17 element. It is also known as halogen element. It is the major constituent of bleaching powder. Ca is an alkaline earth metal and it is also an important element of bleaching powder.