JEE MAIN - Chemistry (2006 - No. 38)

Which of the following statements is true?
H3PO3 is a stronger acid than H2SO3
In aqueous medium HF is a stronger acid than HCl
HClO4 is a weaker acid than HClO3
HNO3 is a stronger acid than HNO2

Explanation

The $$\mathop {HN{O_3}}\limits^{ + 5} $$ is stronger than $$\mathop {HN{O_2}}\limits^{ + 3} .$$ The more the oxidation state of $$N,$$ the more is the acid character.

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