FREE IGNOU BCHCT 131 SOLVED ASSIGNMENT 2023

Question 14: (a) Arrange the compounds in increasing order of acidity and explain. (b) Write the resonance structures of propanoate ion.

(a) The order of increasing acidity is: butanoic acid < 2-chlorobutanoic acid < 3-chlorobutanoic acid < 4-chlorobutanoic acid

Increasing electron-withdrawing effect of the chlorine atom increases acidity.

(b) Resonance structures for propanoate ion:

H                              H
|                               |
H3C–C–O⁻ ↔  H3C–C–O⁻
|                               |
CH3                      CH3