Multiple choice

Which of the following is a physical change?

  1. Oxidation

  2. Reduction

  3. Sublimation

  4. Decomposition
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sublimation is the phase transition from solid directly to gas (or vice versa) without passing through the liquid phase. Only the physical state changes - the chemical identity remains unchanged. Oxidation, reduction, and decomposition are all chemical changes.

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