Among the following oxoacids, the correct order of acid strength is

Among the following oxoacids, the correct order of acid strength is
  1. \(\mathrm{HClO}_{2}>\mathrm{HClO}_{4}>\mathrm{HClO}_{3}>\mathrm{HOCl}\)
  2. \(\mathrm{HOCl}>\mathrm{HClO}_{2}>\mathrm{HClO}_{3}>\mathrm{HClO}_{4}\)
  3. \(\mathrm{HClO}_{4}>\mathrm{HOCl}>\mathrm{HClO}_{2}>\mathrm{HClO}_{3}\)
  4. \(\mathrm{HClO}_{4}>\mathrm{HClO}_{3}>\mathrm{HClO}_{2}>\mathrm{HClO}\)

Solution

The larger the number of oxygen atoms attached to chlorine, greater the electron pull towards oxygen, hence, more easy to remove hydrogen from the acids. The given acids are
\(\begin{array}{llll} \mathrm{Cl}-\mathrm{OH} ; & \mathrm{OCl}-\mathrm{OH} ; & \mathrm{O}_{2} \mathrm{Cl}-\mathrm{OH}, & \mathrm{O}_{3} \mathrm{Cl}-\mathrm{OH} \\ \text { (HOCl) } & \left(\mathrm{HClO}_{2}ight) & \left(\mathrm{HClO}_{3}ight) & \left(\mathrm{HClO}_{4}ight)\end{array}\) ^

Asked in: JEE-TOPICTESTS-CHEMISTRY

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