Vinegar is made up of acetic acid and water. Hence, it contains more water as compared to the content inside the egg.
The water will move from outside to inside till they attain the same concentration. This is known as Osmosis. It is the process of movement of solvent molecules from higher concentration to lower concentration.
In this condition, The content inside egg is having lesser solvent as compared to vinegar, and more solute as compared to the same. Hence, Egg is Hypertonic here.
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