Q. What of these is the chemical formula of Rust?
a. Fe₂O₃. nH₂O
b. Fe₂Cl₃. nH₂O
c. FeCO₂. nH₂O
d. FeO. nH₂O
Rusting is the corrosion of Iron in which iron (Fe) combines with oxygen to form rust, or iron oxide. Fe₂O₃. nH2O is usually called as hydrated ferric Oxide.