Which of the following is not an ester_________________?
Correct answer: B. sodium butyrate
- A. amyl acetate
- B. sodium butyrate
- C. isobutyle formate
- D. octyl acetate
Explanation
Sodium butyrate is an ionic salt formed from butanoic acid and sodium, so it does not contain the ester linkage R-COO-R. Amyl acetate, isobutyl formate and octyl acetate all contain ester groups. The likely mistake is treating every compound derived from a carboxylic acid as an ester, instead of checking for the carbon-linked alkoxy group.
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About Carboxylic Acid Derivatives
Carboxylic acid derivatives include acid halides, acid anhydrides, esters and amides, formed by replacing the hydroxyl group of a carboxylic acid. Their nomenclature, structures, preparation, hydrolysis and relative reactivity are linked through nucleophilic acyl substitution, which differs from the nucleophilic addition reactions of aldehydes and ketones.
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550 free Carboxylic Acids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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