객관식
Which of the following is an example of a physical 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
Burning of wood
C
Melting of ice
D
Digestion of food
검증된 단계별 안내1
Step 1: 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.
Step 2: Analyze each option to determine if it involves a chemical change or a physical change:
Step 3: Rusting of iron involves iron reacting with oxygen to form iron oxide, which is a new substance, so it is a chemical change.
Step 4: Burning of wood involves combustion, producing new substances like carbon dioxide and ash, so it is a chemical change.
Step 5: Melting of ice is a change from solid to liquid water, which does not produce a new substance, so it is a physical change and therefore NOT a chemical change.
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