When iron is exposed to moist air, a reddish brown coating of hydrated Iron (III) Oxide (Fe2O3) is deposited on its surface. This reddish brown coating is called

When iron is exposed to moist air, a reddish brown coating of hydrated

1.	When iron is exposed to moist air, a reddish brown coating of hydrated Iron (III) Oxide (Fe2O3) is deposited on its surface. This reddish brown coating is called
A.	alloy
B.	dust
C.	rust
D.	iron
Answer» D. iron