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 increase 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.
Correct answer: (1) Both Statement I and Statement II are true.
Explanation:
H-F H-Cl H-Br H–I
1s–2p 1s–3p 1s–4p 1s–5p
Down the group size increases
Overlapping decreases
Acidic strength increases