Question

a carbonate which does not decompose on heating​

Answer 1

All the carbonates in this group undergo thermal decomposition to the metal oxide and carbon dioxide gas. The term "thermal decomposition" describes splitting up a compound by heating it.

It can be seen that in both examples the products are a metal oxide and carbon dioxide. The carbon dioxide gas can be detected using limewater. ... The more reactive the metal is, the more difficult it is to decompose its compounds. Therefore, sodium and potassium carbonates are not affected by heat