Q. 184.9( 8 Votes )

Arrange benzene, n-hexane, and ethyne in decreasing order of acidic behaviour. Also, give a reason for this behaviour.

Answer :

The acidic character of a species is defined as the ease with which it can lose its H- atoms.

The hybridization state of carbon in the given compounds is as shown below:-



Now, as the s–character increases, the electronegativity of carbon increases and the electrons of C–H bond pair lies closer to the carbon atom. As a result, the partial positive charge of H- atom increases and H+ ions are set free.


The s–character increases in the order:


sp3 < sp2 < sp


Hence, the decreasing order of acidic behaviour is: -


Ethyne > Benzene > Hexane.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses