# The increasing order of the

Question:

The increasing order of the $\mathrm{p} K_{\mathrm{a}}$ values of the following compounds is:

1. $\mathrm{C}<\mathrm{B}<\mathrm{A}<\mathrm{D}$

2. $\mathrm{B}<\mathrm{C}<\mathrm{D}<\mathrm{A}$

3. $\mathrm{D}<\mathrm{A}<\mathrm{C}<\mathrm{B}$

4. $\mathrm{B}<\mathrm{C}<\mathrm{A}<\mathrm{D}$

Correct Option: , 4

Solution:

Electron withdrawing substituents increase the acidic strength while electron releasing groups decrease the acidic strength.