Which of the following acids is commercially known as acetic acid?

Correct option is A

The correct answer is (a) Ethanoic acid.
· Ethanoic acid is commercially known as acetic acid. Vinegar, a common household condiment, is a diluted solution of acetic acid in water.
Details on other options-
· Butanoic acid: This is a four-carbon carboxylic acid with the formula CH₃CH₂CH₂COOH. It has a somewhat unpleasant, rancid odor and is not commonly used in commercially available products.
· Methanoic acid: This is the simplest carboxylic acid with the formula HCOOH. It's also known as formic acid and has a pungent, irritating odor. While it has some industrial uses, it's not commonly recognized by consumers.
· Propanoic acid: This is a three-carbon carboxylic acid with the formula CH₃CH₂COOH. It has a pungent, cheesy odor and is not typically encountered in commercially available products.