Question

Order of acidic strength
para floro benzoic acid
para chloro benzoic acid
para bromo benzoic acid
para ido benzoic acid
​

Answer 1

The order acidic strength in the increasing order is

Para floro benzoic acid > para chloro benzoic acid > para bromo benzoic acid > para ido benzoic acid

Explanation:

• Fluorine makes it less acidic than the acids due to the large mesomeric effect.
• The acidic strength follows the same order as the negativity of these atoms.
• The stronger the ability to pull electrons stable will be the ions and hence stronger is the acid.