Question

Which of the following compounds give CO2 gas on decomposition?
a)Li^2CO3
b)MgCO3
c)Na2CO3
d) both a and b​

Answer 1

Answer is:

All of them release CO2 as they both release CO2 on decomposition:

MgCO3---------------> MgO + CO2

Na2CO3--------------->Na2O + CO2

Li2CO3----------->Li2O + CO2