Question

Which of the following will give brisk effervescence with sodium hydrogen carbonate and why?

CH₃COOH, CH₃CH₂OH

Answer 1

CH₃COOH (ethanoic acid) gives brisk effervescence with sodium hydrogencarbonate. It reacts with sodium hydrogencarbonate to give sodium ethanoate, carbon dioxide and water. Effervescence is due to carbon dioxide evolved.