JEE Main Chemistry question
How many of the following compounds are more acidic in nature as compared to benzoic acid? p-Methoxybenzoic acid, ethanol, p-nitrobenzoic acid, phenol, sulphuric acid, picric acid, p-chlorobenzoic acid.
Answer: 4
Solution
Benzoic acid, pKa ≈ 4.2. p-Methoxybenzoic acid (electron-donating OMe, weaker acid, pKa ≈ 4.5) and ethanol/phenol (both much weaker acids, pKa ≈16 and ≈10) are all less acidic than benzoic acid. p-Nitrobenzoic acid (strong
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