Ethanoic acid has a _______ odour.

• A. Rotten eggs
• B. Pungent
• C. Vinegar-like
• D. Mild

Ethanoic acid, commonly known as acetic acid, has a distinctive smell that is often compared to vinegar. Therefore, the correct answer is:

C. Vinegar-like

This characteristic odor is due to its presence in vinegar, which is a diluted form of ethanoic acid. Here’s a brief overview of the options:

• Rotten eggs: This smell is typically associated with hydrogen sulfide.
• Pungent: While ethanoic acid can be described as pungent, it is more specifically recognized for its vinegar-like scent.
• Mild: Ethanoic acid is not considered mild in terms of odor.

In summary, ethanoic acid is best described as having a vinegar-like odor.