Which of the following are the conjugate bases of the given acids?
${HClO}_{4}, HCl, HBr, HI, {HNO}_{3} and H_{2} {SO}_{4}$

Easy

A

${ClO}_{3}^{-}, {Cl}^{-}, {Br}^{-}, I^{-}, {NO}_{3}^{2 -} and H_{2} {SO}_{4}^{-}$
B

${ClO}_{3}^{-}, {Cl}^{-}, {Br}^{-}, I, {NO}_{3}^{2 -} and {SO}_{4}^{2 -}$
C

${ClO}_{4}^{-}, {Cl}^{-}, {Br}^{-}, I, {NO}_{3}^{-} and {SO}_{4}^{2 -}$
D

${ClO}_{4}^{-}, {Cl}^{-}, {Br}^{-}, I^{-}, {NO}_{3}^{-} and {HSO}_{4}^{-}$

Solution

Strong acids like perchloric acid ( ${HClO}_{4}$ ), hydrochloric acid (HCl), hydrobromic acid (HBr), hydroiodic acid (HI), nitric acid ( ${HNO}_{3}$ ) and sulphuric acid ( $H_{2} {SO}_{4}$ ) will give conjugate base ions ${ClO}_{4}^{-}, {Cl}^{-}, {Br}^{-}, 1^{-}, {NO}_{3}^{-} and {HSO}_{4}^{-},$ , which are much weaker bases than $H_{2} O$ .

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