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NEET 2007
Exam
NEET
Year
2007
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

NEET 2007 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Which one of the following orders correctly represents the...

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Options

  1. AHOClO<HOCl<HOClO3<\mathrm{HOClO} < \mathrm{HOCl} < \mathrm{HOClO}_3 < HOClO2\mathrm{HOClO}_2
  2. BHOClO2<HOClO3<HOClO<\mathrm{HOClO}_2 < \mathrm{HOClO}_3 < \mathrm{HOClO} < HOCl\mathrm{HOCl}
  3. CHOClO3<HOClO2<HOClO<\mathrm{HOClO}_3 < \mathrm{HOClO}_2 < \mathrm{HOClO} < HOCl\mathrm{HOCl}
  4. DHOCl<HOClO<HOClO2<\mathrm{HOCl} < \mathrm{HOClO} < \mathrm{HOClO}_2 < HOClO3\mathrm{HOClO}_3

Correct answer

D. HOCl<HOClO<HOClO2<\mathrm{HOCl} < \mathrm{HOClO} < \mathrm{HOClO}_2 < HOClO3\mathrm{HOClO}_3

Step-by-step solution

As the oxidation number of the central atom increases, strength of acid also increases. HOCl<HOClO<HOClO2<HOClO3\mathrm{HOCl} < \mathrm{HOClO} < \mathrm{HOClO}_2 < \mathrm{HOClO}_3 Related Theory The chlorine is more electronegative than bromine. As a result, it will attract electrons more towards itself than bromine. This will result in a donation of H+\mathrm{H}+ more easily in HOCl\mathrm{HOCl} than in HOBr. So, the HOCl will be stronger acid than HOBr\mathrm{HOBr}.
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