Question:

In dilute aqueous solution HF is a weaker acid than HI because

Updated On: Jul 6, 2022

H-F bond energy is greater than HI bond energy
The hydration energy of F is higher than that of $I^-$
Of the presence of hydrogen bonds in HF
Fluorine is a stronger base as compared to iodine

Hide Solution

Verified By Collegedunia

The Correct Option is A

Solution and Explanation

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

Was this answer helpful?

Notes on p -Block Elements

Concepts Used:

P-Block Elements

P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of:

Group 13 Elements: Boron family
Group 14 Elements: Carbon family
Group 15 Elements: Nitrogen family
Group 16 Elements: Oxygen family
Group 17 Elements: Fluorine family
Group 18 Elements: Neon family