First slide

Chemical properties

Question

Down the group the acidic character of HX in 17th group increases HF<HCl<HBr<HI because:

Moderate

A

Size of halogen increases
B

H - A bond strength decreases
C

Both (1) and (2)
D

None of these

Solution

HF < HCl < HBr < HI
Down the group the electronegativity decreases and the size increases.
Thus, it becomes easy to lose H⁺ ion. This causes the increase in acidic strength down the group.

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