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The carboxylic acid of least acidic strength among the following is:-A. p-nitrobenzoic acidB. p-methylbenzoic acidC. p-chlorobenzoic acidD. p-methoxybenzoic acid |
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Answer» Correct Answer - D Electron donating groups decrease acid strength of benzoic acid and electron withdrawing groups increase acidic strenth. Order of +I effect is `-OM e gt -Me,` so, p-methoxy benzoic acid is weaker acid than p-methylbenzoic acid. |
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