Statement I: Acid strength increases in the order given as HF HCl HBr HI .Statement II: As the size of the elements F, Cl, Br, I increases down the gr - Chemistry MCQ NEET 2021 2026 | ExamTest.live

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Statement I: Acid strength increases in the order given as HF ≪ HCl ≪ HBr ≪ HI .Statement II: As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases.

Solution & Step-by-step Explanation

1. Statement I is true: The acidity of hydrohalic acids increases down the group.2. Statement II is true: Down the group, the atomic size increases, increasing the H-X bond length. Longer bonds are weaker (lower bond dissociation enthalpy), making it easier for the molecule to release H^{+} in solution.Since II explains I, both are true.

Try it yourself before checking the explanation above.

Statement I: Acid strength increases in the order given as HF ≪ HCl ≪ HBr ≪ HI .Statement II: As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases.

Statement I is correct but Statement II is false.

Statement I is incorrect but Statement II is true.

Both Statement I and Statement II are true

Both Statement I and Statement II are false.

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