객관식
Which of the following is an example of a chemical change?
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1. Intro to General Chemistry
Physical & Chemical Changes
객관식
Which of the following is NOT a chemical change?
A
Rusting of iron
B
Melting of ice
C
Digestion of food
D
Burning of wood
검증된 단계별 안내1
Understand the difference between a chemical change and a physical change. A chemical change results in the formation of new substances with different properties, while a physical change affects the form or state of a substance without changing its chemical identity.
Analyze each option to determine if it involves a chemical change:
Rusting of iron involves iron reacting with oxygen to form iron oxide, which is a new substance, so it is a chemical change.
Digestion of food involves breaking down complex molecules into simpler ones through chemical reactions, so it is a chemical change.
Burning of wood involves combustion, producing new substances like carbon dioxide and ash, so it is a chemical change.
Melting of ice involves changing water from solid to liquid state without altering its chemical composition, so it is a physical change and NOT a chemical change.
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