Question 2
Separation of MixturesWhich of the following is a physical change?
- A.Burning kerosine
- B.Freezing ice-cream
- C.Exposing white phosphorus to air
- D.Dissolving calcium in water
Show the answer and explanation
Answer: B (Freezing ice-cream)
Explanation
Freezing only changes the state of the ice-cream; no new substance forms. Burning, phosphorus reacting with air and calcium reacting with water all make new substances.