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Which of the following changes is physical?

Chemistry
JAMB 1978
Which of the following changes is physical?
  • A. Adding iron filing to aerated water
  • B. Adding sodium metal to water
  • C. Cooling a solution of Iron (II) sulphate to obtain the hydrated salt
  • D. Cooling water to obtain ice
  • E. Burning the domestic gas (Utilgas) for cooking
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Correct Answer: Option D
Explanation
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