Carboxylic Acids Question 131
Question: Among the following acids which has the lowest $ pKa $ value
[AIEEE 2005]
Options:
A) $ CH_3COOH $
B) $ HCOOH $
C) $ {{(CH_3)}_2}CH-COOH $
D) $ CH_3CH_2COOH $
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Answer:
Correct Answer: B
Solution:
$ K _{a}\propto \frac{1}{pK _{a}} $ ; The value of $ K _{a} $ is highest for $ HCOOH $ .