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NEET2005Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

The correct order of acid strength is:

Options

  1. AHClO ₄ < HClO ₃ < HClO ₂ < HClO
  2. BHClO < HClO ₂ < HClO ₃ < HClO ₄
  3. CHClO ₄ < HClO ^2 < HClO ₂ < HClO ₃
  4. DHClO ₂ < HClO ₃ < HClO ₄ < HClO

Correct answer

B. HClO < HClO ₂ < HClO ₃ < HClO ₄

Step-by-step solution

Oxygen is more electronegative than chlorine. With an increase in the number of O atoms attached to Cl , more electrons are pulled away from O - H bond and weaker becomes the O - H bond. This increases the acid strength. The decreasing order of acidic strength is HClO

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