The increasing order of the
Question:

The increasing order of the $\mathrm{pKa}$ values of the following compounds is :

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

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

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

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

Correct Option: , 4

Solution:

Acidic strength is inversely proportional to pka.