Question

Which one is the most acidic compound?

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> NEET 2017

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Due to the presence of three strong electron withdrawing groups $\left(\text{-M effect}\right)$ at ortho and para positions, picric acid $\left(\text{2, 4, 6-trinitrophenol}\right)$ is more acidic compound than (b) and (c).

$-C{H}_3$ group increases electron density on $OH$ group by hyperconjugation effect, thus it is less acidic.

Hence, option (d) is correct.