Question

Carbonates of --------and ---------metals do not produce carbon dioxide gas on heating.

Answer 1

Answer:

Carbonates of Sodium and Potassium are stable and don't decompose on heating.

Answer 2

Answer:

Sodium and Potassium

Explanation:

Carbonates of sodium and potassium are stable and they do not decompose on heating. So, the carbonates that do not decompose on heating are do not produce on heating