Question

The specific gravity of sweetened condensed whey at 50$^\circ$C.

• A. 1.360
• B. 1.030
• C. 1.44
• D. 1.029

Hint:

Liquid dairy products usually have specific gravity just above 1—extreme values indicate incorrect options.

Answer 1

The Correct Option is B

Concept: Specific gravity is an important physical property in dairy products, representing the ratio of density of a substance to the density of water. For sweetened condensed whey, the presence of dissolved solids like lactose and added sugar increases density.

Step 1: Understanding composition.
Sweetened condensed whey contains:
• Lactose
• Added sugar
• Minerals
• Residual proteins

Step 2: Effect on density.
Higher dissolved solids increase density, but not excessively because whey has lower fat compared to milk.

Step 3: Typical range.
Specific gravity of such dairy liquids usually lies slightly above water (~1.0), commonly around 1.02–1.04.

Step 4: Evaluating options.

• 1.360 and 1.44 → Extremely high, unrealistic
• 1.029–1.030 → Falls within expected range

Step 5: Conclusion.
Thus, the correct value is 1.030.