All of the following are examples of chemical change EXCEPT:Group of answer choicesa) the condensation of steam.b) the rusting of iron.c) the combustion of propane gas.d) the tarnishing of silver.e) the decomposition of water to hydrogen gas and oxygen gas.
Question
All of the following are examples of chemical change EXCEPT:Group of answer choicesa) the condensation of steam.b) the rusting of iron.c) the combustion of propane gas.d) the tarnishing of silver.e) the decomposition of water to hydrogen gas and oxygen gas.
Solution
The correct answer is a) the condensation of steam. This is a physical change, not a chemical change. In a physical change, the form of matter is altered but one substance is not transformed into another. The condensation of steam involves a change from gas to liquid water, which is a change in state, not a chemical change. The other options involve chemical changes, where one substance is transformed into another.
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