Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and then mixes in oil until the ingredients are completely blended together. The chef says that it’s great on sandwiches and that it can be stored without separating.Which best describes the purpose of the egg yolk in the recipe?
Answer
A
It allows the oil to change from liquid to a gas in order to form bubbles.
B
It acts to hold the vinegar and oil together in a colloid.
C
It helps the vinegar be able to form a solution with the salt and sugar.
D
It mixes with both the vinegar and oil to form a suspension.
Explanation
Vinegar is mostly water, while oil does not dissolve in water. Egg yolk contains emulsifiers that help oil droplets stay dispersed throughout the vinegar, forming a stable colloid (an emulsion) that does not quickly separate. So the egg yolk holds the vinegar and oil together; it does not turn oil into a gas or make a suspension.
AI-written and checked against the verified answer.