
Which one of the halogen acids is a liquid?
A. $HBr$
B. $HI$
C. $\,HCl$
D. $HF$
Answer
164.4k+ views
Hint: The hydrogen atom combining with different halogen or group $17$ elements forms halogen acids. The halogen acid which is most stable can exist as liquid.
Complete Step by Step Answer:
Among the halogen acids hydrogen iodide has the lowest bond dissociation energy so, it can easily donate its hydrogen atom and acts as the strongest acid among the halogen acids. Hydrogen fluoride is least acidic among halogen acids.
Among halogen acids as the size of the halogen atoms increases from fluorine to iodine the bond with the small hydrogen atom becomes weak due weak orbital overlap. So, among the halogen acids hydrogen iodide has the weakest bond that is formed between the small hydrogen and big iodine atom. It has the lowest bond dissociation energy among the halogen acids. Thus it has the highest acidity.
In case of hydrogen fluoride it forms intermolecular hydrogen bonding between electropositive hydrogen atom and electronegative fluorine atom. Thus due to the presence of hydrogen bonding hydrogen fluoride exists as liquid.
Thus the correct option is D.
Note: Hydrogen bonds can be defined as the attractive force which binds the hydrogen atom of one molecule with the electronegative atom of another molecule. Hydrogen fluoride forms a strong hydrogen bond and acts as a weakest acid.
Complete Step by Step Answer:
Among the halogen acids hydrogen iodide has the lowest bond dissociation energy so, it can easily donate its hydrogen atom and acts as the strongest acid among the halogen acids. Hydrogen fluoride is least acidic among halogen acids.
Among halogen acids as the size of the halogen atoms increases from fluorine to iodine the bond with the small hydrogen atom becomes weak due weak orbital overlap. So, among the halogen acids hydrogen iodide has the weakest bond that is formed between the small hydrogen and big iodine atom. It has the lowest bond dissociation energy among the halogen acids. Thus it has the highest acidity.
In case of hydrogen fluoride it forms intermolecular hydrogen bonding between electropositive hydrogen atom and electronegative fluorine atom. Thus due to the presence of hydrogen bonding hydrogen fluoride exists as liquid.
Thus the correct option is D.
Note: Hydrogen bonds can be defined as the attractive force which binds the hydrogen atom of one molecule with the electronegative atom of another molecule. Hydrogen fluoride forms a strong hydrogen bond and acts as a weakest acid.
Recently Updated Pages
Hess Law of Constant Heat Summation: Definition, Formula & Applications

Disproportionation Reaction: Definition, Example & JEE Guide

Environmental Chemistry Chapter for JEE Main Chemistry

JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

Difference Between Natural and Whole Numbers: JEE Main 2024

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

Atomic Structure - Electrons, Protons, Neutrons and Atomic Models

Displacement-Time Graph and Velocity-Time Graph for JEE

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Learn About Angle Of Deviation In Prism: JEE Main Physics 2025

Types of Solutions

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry In Hindi Chapter 1 Some Basic Concepts of Chemistry

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Degree of Dissociation and Its Formula With Solved Example for JEE

Instantaneous Velocity - Formula based Examples for JEE
