1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: The strength of haloacids increases in the order: HI < < HBr < < HCl < < HF Reason: Strength of acid HA depends only on the electronegativity difference between H and A.

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Q. Assertion : The strength of haloacids increases in the order : $HI < < HBr < < HCl < < HF$
Reason : Strength of acid $HA$ depends only on the electronegativity difference between $H$ and $A$.

Equilibrium

Solution:

The correct order of acidic strength is $HF < < HCl < < HBr < < HI$. While comparing elements in the same group of the periodic table, $H— A$ bond strength is a more important factor in determining acidity than its polar nature. As the size of A increases down the group, $H— A$ bond strength decreases and so the acid strength increases.