Question

The least acidic of the following acids is .....​

Answer 1

Answer:

Acetic acid will be least acidic because there's no -I effect. Whereas in the other compounds, the extent of -I effect would be greater as compared to acetic acid due to greater number of chlorine atom.

So acidic strength will be in the order:

Trichloro acetic acid> Dichloro acetic acid> monochloro acetic acid> acetic acid.

Hope that helped :)