Question

Which is a physical property of milk?

A. Milk has a pH ranging from 6.4 to 6.8.
B. Milk spoils when left unrefrigerated over several days.
C. Milk boils at about 212°F (100°C).
D. Milk curdles when mixed with vinegar.

Answer 1

C, because Boiling doesnt change the substance, making it a Physical property