Post-UTME Chemistry 2005 Objective — Question 3
Question 3 of 27 from the Post-UTME Screening (Post-UTME) Chemistry 2005 Objective paper, with the correct answer and a full explanation.
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Which of the following is a physical change?
- A. The bubbling of chlorine into water
- B. The passing of steam over heated iron
- C. The burning of substances in air
- D. The dissolution of sodium chloride in waterCorrect
Explanation
Dissolving sodium chloride in water is a physical (reversible) change, unlike the chemical reactions described in the other options.
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