Question

Which of the following compound(s) has unpleasant odour?

• A. Lower aliphatic amines
• B. Lower aliphatic carboxylic acids
• C. Higher aldehydes
• D. Lower aldehydes

Answer 1

Answer: (A), (B), (C)

Higher aldehydes

Lower aldehydes have strong pungent smell and higher aldehydes have fragrant odour.

Lower aliphatic carboxlic acids from 1C to 9C have unpleasant smell and higher aliphatic carboxylic acid are odourless.

Lower aliphatic amines have fishy odour.

Hence, (a), (b) and (c) are correct.