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
Verified Correct Answer: D.
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #762)