Question: Under identical heating methods and durations, if you first add one of the following additives at the same volume fraction to the same liquid, which treatment is most likely to produce the weakest color change after heating?
A. Vegetable oil
B. Baking soda solution
C. Saline (salt water)
D. Lemon juice
Clues:
1. A person is using a blowtorch with a visible flame.
2. The flame is directed into a rectangular, transparent glass dish.
3. The dish contains a white, opaque liquid.
4. The area of the liquid being heated by the flame has turned a brownish color.
Answer: D
Category: Biology