Subtopic: Preservation of food by cooling and freezing
Question Statement:
In order to freeze a fruit juice its thermodynamic temperature is
Options:
(A) higher than the freezing point of water
(B) below the freezing point of water
(C) equal to the freezing point of water
(D) dependent upon the water content of the fruit juice
Official Answer Key:
B
Step-by-Step Solution & Explanation
Fruit juice is a solution containing dissolved sugars, acids and salts. By freezing-point depression (colligative property), the freezing point of the juice is below 0 °C, so the juice must be cooled below the freezing point of pure water before ice begins to form.
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