Equilibrium Question 270
Question: Arrange the acids (I) $ H_2SO_3 $ (II) H3PO3 and (III) HClO3 in the decreasing order of acidity [UPSEAT 2001]
Options:
A) I > III > II
B) I > II > III
C) II > III > I
D) III > I > II
Show Answer
Answer:
Correct Answer: D
Solution:
Acidity is directly propotional to oxidation number. As the O.No. of S, P and Cl in $ H_2SO_3,H_3PO_3 $ & $ HClO_3 $ is +4, +3 & +5 respectively so decreasing order of acidity will be III > I > II.
