GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following represents a chemical change?
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Ice melting into water
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Shattering glass
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Salt dissolving into water
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Rusting iron
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Explanation:
Detailed explanation-1: -The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.
Detailed explanation-2: -Rusting of iron is an example of a chemical change.
Detailed explanation-3: -Thus rusting of iron is a chemical change.
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