The ________ class of minerals includes a substance commonly known as rust.
A)oxides
B)carbonates
C)halides
D)silicates

Question

Quizplus · Accepted Answer

Rust is a common name for hydrated iron oxide (Fe2O3·nH2O), which belongs to the oxide class of minerals. Therefore, the best choice is (A) oxides. Carbonates are minerals that contain the carbonate ion (CO32-), halides are minerals that contain halogen ions (e.g. chloride, fluoride), and silicates are minerals that contain silicon and oxygen. None of these classes of minerals include rust.

The ________ Class of Minerals Includes a Substance Commonly Known