Pure ethanoic acid has a melting point of 290 K, so it often freezes during winter in cold places. By what name is it therefore known?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Glacial acetic acid
Ethanoic acid is commonly called acetic acid. Since the pure acid melts at 290 K (about 17°C), it freezes in cold winters and looks like ice, which gave it the name glacial acetic acid.