1.It undergoes reduction to form carbon (ii) oxide in the presence of coke
CO2 (g) +C(g) 2CO(g)
2. It dissolves in water to form trixocarbonate (iv) acids
CO2(g) +H2O(L) H2CO3(ag)
3. It readily reacts with alkalis to form trioxocaioeate (iv) salts
CO2(g) +2NaON(ag) Na CO3(ag) + H2O(L)
4. it reacts with burning magnesium
CO2(g) + Mg(S) MgO(S) + C(S)