Question

Bleaching powder and bleach solution are produced on a large scale and is used in several house-hold products. The effectiveness of bleach solution is often measured by iodometry. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is:

• A. $C{l}_{2}O$
• B. $C{l}_2{O}_7$
• C. $Cl{O}_2$
• D. $C{l}_2{O}_6$
• E. $C{l}_3{O}_5$
• F. $C{l}_2{O}_3$
• G. $C{l}_2{O}_5$
• H. $C{l}_3{O}_9$

Answer 1

Answer: (A)

Bleaching powder is $Ca\left(OCl\right)Cl$.

So, bleaching powder contains a salt of $HOCl$.

$C{l}_{2}O$ is an anhydride of $HOCl$.

$C{l}_{2}O+H_{2}O\Rightarrow 2HOCl$.

Hence, option A is correct.