June 2018 NY Regents Chemistry Exam
7 Which statement describes a chemical property of iron? (1) Iron oxidizes. (2) Iron is a solid at STP. (3) Iron melts. (4) Iron is attracted to a magnet.
Solution: A chemical property describes something that changes the identity of a substance. A chemical change represents a reaction. We are looking for a reaction here which is in choice 1. Phase changes such as melting are physical properties.
Answer:1
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