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
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is D Both Assertion and Reason are incorrect
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.