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Question

Chemistry Question on p -Block Elements

Which of the following statement is not true ?

A

HF is stronger acid than HCI

B

Among halide ions, iodide is the most powerful reducing agen

C

Fluorine is the only halogen that does not show a variable oxidation state

D

HOCI is a stronger acid than HOBr

Answer

HF is stronger acid than HCI

Explanation

Solution

Due to the strong hydrogen-fluorine bond, the proton is not removed easily; hence, HF is the weakest acid. More bond dissociation energy is required because of the high electronegativityof the F atom,

Acidic Nature∝1bond dissociation energyAcidic \ Nature\propto {1 \over bond\ dissociation\ energy}

Therefore, HF is not a stronger acid than HCl due to intermolecular hydrogen bonding.

Hence A) HF is a stronger acid than HCI is not true.