pBlock ElementsII 2 Question 27
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29. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is
======= ####29. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{Cl}_{2} \mathrm{O}$
(b) $\mathrm{Cl}{2} \mathrm{O}{7}$
(c) $\mathrm{ClO}_{2}$
(d) $\mathrm{Cl}{2} \mathrm{O}{6}$
Passage 3
The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.
The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers $+2,+4$ and $+6 . \mathrm{XeF}{4}$ reacts violently with water to give $\mathrm{XeO}{3}$. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
$(2007,3 \times 4 \mathrm{M}=12 \mathrm{M})$
Show Answer
Solution:
- Bleaching powder is $\mathrm{Ca}(\mathrm{OCl}) \mathrm{Cl}$. Therefore, the oxoacid whose salt is present in bleaching powder is $\mathrm{HOCl}$. Anhydride of $\mathrm{HOCl}$ is $\mathrm{Cl}_{2} \mathrm{O}$ as
$$ 2 \mathrm{HOCl} \longrightarrow \mathrm{Cl}{2} \mathrm{O}+\mathrm{H}{2} \mathrm{O} $$
NOTE The oxidation number of element in anhydride and oxoacid remains the same.
Passage 3 Q.Nos. (30-32)
