Question: Which of the following has a higher specific gravity? (MCAER 2012)
Options:
Skim milk
Whole milk
Heavy cream
Water
✔Explanation: Specific gravity is the ratio of a substance's density to the density of water. Skim milk, with its fat removed, has a higher proportion of non-fat solids (proteins, lactose, minerals) compared to whole milk. These solids are denser than water, thus increasing the specific gravity of skim milk.