1. Tardigrade
  2. Question
  3. Chemistry
  4. The correct decreasing order of pKa is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The correct decreasing order of $pK_a$ isChemistry Question Image

AIIMSAIIMS 2011Alcohols Phenols and Ethers

Solution:

Weaker acids have higher $pk_{a}-OCH_3$ at meta-position exerts only $-I $ effect, hence increases the acidity.

$-I$ effect order : - $NO_2 >\, -OCH_3 >\, -Cl$

$-CH_3$ has $+I$ effect