Which of the following statements is true?

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(B) The acidity of oxoacids depends on the stability of their conjugate bases.$HNO_3$ (nitric acid) forms the nitrate ion $(NO_3^-)$ as its conjugate

Vedclass · Accepted Answer

$HNO_3$ is a stronger acid than $HNO_2$

Vedclass · Answer

(B) The acidity of oxoacids depends on the stability of their conjugate bases.$HNO_3$ (nitric acid) forms the nitrate ion $(NO_3^-)$ as its conjugate base,which is stabilized by resonance.$HNO_2$ (nitrous acid) forms the nitrite ion $(NO_2^-)$ as its conjugate base.Since the conjugate base of $HNO_3$ is more resonance-stabilized than that of $HNO_2$,$HNO_3$ is a stronger acid than $HNO_2$.Other options are incorrect because:$HClO_4$ is a stronger acid than $HClO_3$ due to higher oxidation state of $Cl$.$H_2SO_3$ is a stronger acid than $H_3PO_3$.$HCl$ is a stronger acid than $HF$ in aqueous medium due to the high bond dissociation energy of $H-F$.

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