Question

Which is the strongest acid in the following ?

• A. $H_2SO_3$
• B. $H_2SO_4$
• C. $HClO_3$
• D. $HClO_4$

Answer 1

Answer: (D)

$HClO_4$

Answer 2

More the number of oxygen atoms attached to the central atom, more is the electron withdrawal effect towards oxygen atom, which in turn makes central atom electron deficient so the hydrogen attached becomes more and more acidic with increasing number of oxygen atoms.