Which of the following carboxylic acids has the highest boiling point? (2020)

Which of the following carboxylic acids has the highest boiling point? (2020)

Step 1: Understand that carboxylic acids are organic compounds that contain a carboxyl group (-COOH).
Step 2: Know that boiling points of carboxylic acids can be influenced by their molecular weight and the length of their carbon chain.
Step 3: Compare the carbon chain lengths of the given carboxylic acids. Longer chains generally lead to higher boiling points.
Step 4: Identify the molecular weights of the carboxylic acids. Higher molecular weight usually means a higher boiling point.
Step 5: Determine which carboxylic acid has the longest carbon chain and the highest molecular weight.
Step 6: Conclude that butanoic acid has the longest carbon chain and therefore the highest boiling point among the options.

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