7
practice testMultiple Choice

Practice Test

Question 7 • Chemistry

Iron reacts with oxygen to form iron oxide (rust) . Which best describes this statement?

Answer
A
Iron oxide is formed by rearranging atoms.
B
Iron oxide is the gaseous state of iron.
C
Iron oxide is made up of only iron atoms.
D
Iron oxide is the liquid state of iron.

Explanation

When iron reacts with oxygen, the atoms bond in a new arrangement to form iron oxide, a compound. It is not iron in a different physical state, and it contains oxygen as well as iron. Therefore, the best choice is “Iron oxide is formed by rearranging atoms.”

AI-written and checked against the verified answer.

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