Question

a metal carbonate that gives metal carbon dioxide and oxygen on heating​

Answer 1

Answer:

BaCO  

3

​

 

BaCO  

3

​

 is most thermally stable as the size of Ba  

2+

 is big due to which it is having low polarising power and thus cannot polarize oxygen electrons due to which carbonates of large cations are stable.

Explanation:

Answer 2

Answer:

the ratio of the velocity of light in a vacuum to its velocity in a specified medium.