Question

Among the following the strongest acid is

• A. $CH_3COOH$
• B. $C_6H_5COOH$
• C. $m-CH_3OC_6H_4COOH$
• D. $p-CH_3OC_6H_4COOH$

Answer 1

Answer: (A)

$CH_3COOH$

Answer 2

$C_6H_5COOH$ is the strongest acid. In $m-CH_3OC_6H_4COOH$ and $p-CH_3OC_6H_4COOH$, the $-OCH_3$ group' being electron donating makes benzoic acid weaker.