Multiple Choice
Which term is used to refer to an observable trait in the context of physical properties?
1. Intro to General Chemistry
Physical & Chemical Changes
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Which of these scenarios is most likely a chemical reaction?
A
Ice melting into water
B
Water boiling to form steam
C
Salt dissolving in water
D
Iron rusting in the presence of moisture
Verified step by step guidance1
Understand the definition of a chemical reaction: A chemical reaction involves the transformation of one or more substances into new substances with different chemical properties.
Analyze each scenario: Ice melting into water and water boiling to form steam are physical changes, as they involve changes in state but not in chemical composition.
Consider the scenario of salt dissolving in water: This is a physical change where the salt dissociates into ions, but no new substances are formed.
Examine the scenario of iron rusting: This involves iron reacting with oxygen and moisture to form iron oxide, a new substance, indicating a chemical reaction.
Conclude that the scenario most likely to be a chemical reaction is iron rusting in the presence of moisture, as it results in the formation of a new substance.
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