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IMSO 2019 Science International - Theory I Question 27

IMSO Science · IMSO 2019 Science International - Theory I

Question 27

Each procedure forms bubbles. Which is a physical change?
  1. Heating water to boiling
  2. Pouring acid onto calcium carbonate
  3. Dropping an antacid tablet into water
  4. Pouring vinegar onto baking soda