Pblock Elementsii Result Question 22
22. The correct statement(s) about the oxoacids, $\mathrm{HClO} _4$ and $\mathrm{HClO}$, is (are)
(2017 Adv.)
(a) The central atom in both $\mathrm{HClO} _4$ and $\mathrm{HClO}$ is $s p^3$-hybridised
(b) $\mathrm{HClO} _4$ is formed in the reaction between $\mathrm{Cl} _2$ and $\mathrm{H} _2 \mathrm{O}$
(c) The conjugate base of $\mathrm{HClO} _4$ is weaker base than $\mathrm{H} _2 \mathrm{O}$
(d) $\mathrm{HClO} _4$ is more acidic than $\mathrm{HClO}$ because of the resonance stabilisation of its anion
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Answer:
Correct Answer: 22. ( a,c,d )
Solution:
(a) $\mathrm{ClO}_4^{-}$is more stable than $\mathrm{ClO}^{-}$.
(b) Incorrect : $\mathrm{Cl}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{HCl}+\mathrm{HOCl}$
(c)
(d) $\mathrm{HClO}_4 \text { is stronger acid than } \mathrm{H}_2 \mathrm{O} \text {. }$
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