Question

The reaction of $C{l_2}$ with $X$ gives bleaching powder. $X$ is:
(A) $CaO$
(B) $Ca{(OH)_2}$
(C) $Ca(OC{l_2})$
(D) $Ca{(Cl{O_3})_2}$

Answer 1

Hint:To solve this question, we must first understand some basic concepts about bleaching powder. Then we need to assess the formation reaction with Chlorine and the other reactant used and then only we can conclude the correct answer.

Complete step-by-step answer:Before we move forward with the solution of this given question, let us first understand some basic concepts: Bleaching powder: is a pale yellowish powder existing with a strong smell of chlorine. It is soluble in water but due to the presence of impurities, we never observe a clear solution. Its chemical formula is \[CaOC{l_2}\] with its chemical name as Calcium hypochlorite.Bleaching powder has number of uses:
1It is used for bleaching dirty clothes in the laundry as a bleaching agent for cotton and linen in the textile industry.
2.Bleaching powder is a strong oxidizing agent so it can be used as an oxidizer in many industries.
3.It is also used as a disinfectant which is used for disinfecting water to make potable water.
Step 2: Bleaching Powder or Calcium hypochlorite is produced industrially by treating lime $(Ca{(OH)_2})$ with chlorine gas:
$2C{l_2}\,\, + \,\,2Ca{(OH)_2}\,\, \to \,\,CaOC{l_2}\,\, + \,\,CaC{l_2}\,\, + 2{H_2}O$
Hence $X$ is $Ca{(OH)_2}$ .

So, clearly we can conclude that the correct answer is Option (B).

Note:Bleach is very irritating and it can sometimes be corrosive to the skin, lungs and eyes. It can also burn human tissues internally or externally. A bleach is a $5\% $ solution of sodium hypochlorite \[\left( {NaClO} \right)\] with about $1\% $ sodium hydroxide to stabilize it. While the bleaching powder is the most commonly used solid bleaching agent. It is calcium hypochlorite as\[Ca\left( {OCl} \right)Cl\].