Question

_______ gives brisk effervescence when sodium carbonate reacts with an acid *

a.CO2
b.H2
c.SO2
plz ans it's urgent....​

Answer 1

Answer:

co2

Explanation:

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.

Answer 2

Explanation:

when we add ethanoic acid to sodium carbonate then the product formed is sodium acetate and the brisk effervescence is due to the reason as carbon dioxide is given off .