Chapter 19, Problem 8E

The following reactions all occur in a blast furnace. Which of these are redox reactions?

(a) $3{\text{Fe}}_2{\text{O}}_3\left(s\right)+\text{CO}\left(g\right)\to 2{\text{Fe}}_3{\text{O}}_4\left(s\right)+{\text{CO}}_2\left(g\right)$

(b) ${\text{Fe}}_3{\text{O}}_4\left(s\right)+\text{CO}\left(g\right)\to 3\text{FeO}\left(s\right)+{\text{CO}}_2\left(g\right)$

(c) $\text{FeO}\left(s\right)+\text{CO}\left(g\right)\to \text{Fe}\left(l\right)+{\text{CO}}_2\left(g\right)$

(d) $\text{C}\left(s\right)+{\text{O}}_2\left(g\right)\to {\text{CO}}_2\left(g\right)$

(e) $\text{C}\left(s\right)+{\text{CO}}_2\left(g\right)\to 2\text{CO}\left(g\right)$

(f) ${\text{CaCO}}_3\left(s\right)\to \text{CaO}\left(s\right)+{\text{CO}}_2\left(g\right)$

(g) $\text{CaO}\left(s\right)+{\text{SiO}}_2\left(s\right)\to {\text{CaSiO}}_3\left(l\right)$