Question
Chemistry Question on p -Block Elements
In dilute aqueous solution HF is a weaker acid than HI because
A
H-F bond energy is greater than HI bond energy
B
The hydration energy of F is higher than that of I−
C
Of the presence of hydrogen bonds in HF
D
Fluorine is a stronger base as compared to iodine
Answer
H-F bond energy is greater than HI bond energy
Explanation
Solution
HI is strongest acid because due to largest size of I, the H-I bond is weakest and its bond dissociation energy is least so it breaks most readily and hence HI is the strongest acid. The order of acidic strength is HI > HBr > HCl > HF