pBlock ElementsII 2 Question 25
25. The correct statement(s) regarding,
(i) $\mathrm{HClO}$, (ii) $\mathrm{HClO}{2}$ , (iii) $\mathrm{HClO}{3}$ and (iv) $\mathrm{HClO}_{4}$ is (are)
(a) the number of $\mathrm{Cl}=\mathrm{O}$ bonds in (ii) and (iii) together is two
(b) the number of lone pair of electrons on $\mathrm{Cl}$ in (ii) and (iii) together is three
(c) the hybridisation of $\mathrm{Cl}$ in (iv) is $s p^{3}$
(d) amongst (i) to (iv), the strongest acid is (i)
Passage Based Questions
Passage 1
The reactions of $\mathrm{Cl}{2}$ gas with cold-dilute and hot-concentrated $\mathrm{NaOH}$ in water give sodium salts of two (different) oxoacids of chlorine, $P$ and $Q$, respectively. The $\mathrm{Cl}{2}$ gas reacts with $\mathrm{SO}_{2}$ gas in the presence of charcoal, to give a product $R$. $R$ reacts with white phosphorus to give a compound $S$. On hydrolysis, $S$ gives an oxoacid of phosphorus $T$. (2013 Adv.)
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Solution:
25.
(iii)
$$ \mathrm{H}-\ddot{\mathrm{O}}-\ddot{\mathrm{Cl}}=\ddot{\mathrm{O}} $$
(ii)
(iv) (a) Number of $\mathrm{Cl}^{-}=\mathrm{O}$ bonds in (ii) and (iii) together is three. Hence, wrong. (b) Number of Lone Pair on $\mathrm{Cl}$ in (ii) and (iii) together is three. Hence, correct.
(c) In (iv), $\mathrm{Cl}$ is $s p^{3}$-hybridised. Hence, correct.
(d) Amongst (i) to (iv), the strongest acid is (iv). Hence, wrong.
Passage 1 Q. Nos. (26-27)
acid
$$ \mathrm{Cl}{2}+\mathrm{SO}{2} \longrightarrow \mathrm{SO}{2} \mathrm{Cl}{2} $$
Passage 2 Q.Nos. (28-29)
