Multiple choice

Which among the following represents the correct order of acidic strength?

  1. CO2 < H2O < CaO

  2. IOH < BrOH < ClOH

  3. HClO3 < HClO2 < HClO

  4. HI < HBr < HCl

  5. HF < H2O < NH3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among the oxyacids of halogens, if there are the same number of oxygen bonded to central atom, higher the electronegativity of halogen, stronger the acid. Hence, the correct order of acidic strength is IOH < BrOH < ClOH.

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