Statement I: Acid strength increases in the order given as HF < < HCl < < HBr < < HI…

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.

In the light of the above statements, choose the correct answer from the options given below.

  1. Both Statement I and Statement II are true.
  2. Both Statement I and Statement II are false.
  3. Statement I is correct but Statement II is false.
  4. Statement I is incorrect but Statement II is true.

Solution

Acidic strength of hydracids increases in order

HF≪HCl≪HBr≪HI

So, statement-I is true
The above order of acidic strength is due to decrease in bond strength. As the size of atom increases, bond length increases and bond strength decreases.
Thus, statement I and statement II are true

Asked in: NEET 2021

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