Question

Bleaching powder is obtained by treating $C{{l}_{2}}$ with?
A. $Ca{(OH)}_2$
B. $CaO$
C. $CaCO_3$
D. $CaC{{l}_{2}}$

Answer 1

Hint: It’s a colorless white powder which is produced when quicklime is mixed or slaked with water. It’s used in industrial settings, such as sewage treatment, paper production and food processing etc. It is produced commercially in enormous quantities by thermal decomposition of limestone and subsequent exothermic reaction of the calcium oxide with water.

Complete step by step answer:
Now, let us know about bleaching powder!
Bleaching powder is manufactured using Backmann’s plant in which slack and chlorine are made to react to create Bleaching powder. It’s a yellowish white powder with a strong smell of chlorine. When exposed to air, bleaching powder reacts with carbon dioxide from the atmosphere to produce calcium carbonate and chlorine.

Let us know the preparation of bleaching powder!
Bleaching powder is synthesized by the action of chlorine gas, the gas which is produced from the chlor-alkali process, on dry slaked lime.
$Ca{{(OH)}_{2}}+C{{l}_{2}}\to CaOC{{l}_{2}}+{{H}_{2}}O$
Let’s see how bleaching powder actually bleaches!
In the presence of a very small amount of dilute acid, it produces nascent oxygen. Due to the evolution of nascent oxygen, it acts as an oxidizing agent and a bleaching agent.

Uses of Bleaching powder:
It is used for bleaching dirty clothes in the laundry, as a bleaching agent for cotton and linen in the textile industry.
It is a strong oxidizing agent hence used as an oxidizer in many industries.
It is used as a disinfectant which is used for disinfecting water to make potable water.

Therefore, option A is the answer!

Note: Food-grade calcium hydroxide is generally safe. However, if you work with industrial-grade calcium hydroxide, ingesting it can result in calcium hydroxide poisoning. This can lead to severe injury or death.