Neet Solved Paper 2013 Question 16
Question: Which is the strongest acid in the following?
Options:
A) $ {H_2}S{O_4} $
B) $ HCl{O_3} $
C) $ HCl{O_4} $
D) $ {H_2}S{O_3} $
Show Answer
Answer:
Correct Answer: C
Solution:
The strength of oxyacids can also be decided with the help of the oxidation number central atom.
Higher the oxidation number of central atom, more acidic is the oxyacid.
$ H _2\overset{+\ 6}{\mathop{S}}\ O _4,HC\overset{+}{\mathop{l}}\ {{\overset{5}{\mathop{O}}\ }_3},H\overset{+}{\mathop{Cl}}\ {{\overset{7}{\mathop{O}}\ } _{4,}}H _2\overset{+}{\mathop{S}}\ {{\overset{4}{\mathop{O}}\ }_3} $
Since, in $ HClO _4, $ oxidation number of Cl is highest,
so $ HClO _4 $ is the strongest acid among the given.
