Q is a mixture made up of two compounds of Group 2 elements. When Q undergoes thermal decomposition, it forms a white solid and only two gaseous products. One of these gases relights a glowing splint. What might the components of mixture Q be?
- A$\text{MgCl}_2$ and $\text{CaCO}_3$
- B$\text{MgCO}_3$ and $\text{Ca(NO}_3)_2$
- C$\text{Mg(NO}_3)_2$ and $\text{Ca(NO}_3)_2$
- D$\text{MgO}$ and $\text{CaO}$