Which rapid freezing method uses very low temperatures with liquid nitrogen or carbon dioxide?

Which rapid freezing method uses very low temperatures with liquid nitrogen or carbon dioxide?

• A. Air blast freezing
• B. Cryogenic freezing
• C. Plate or contact freezing
• D. Immersion freezing

Answer: (B)

When foods are frozen rapidly with extremely low temperatures using liquids like liquid nitrogen or carbon dioxide, the heat is removed so quickly that ice crystals form very small ones. This minimizes cell damage, preserves texture, and reduces drip loss, giving higher-quality frozen products. This approach is cryogenic freezing, distinguished from other rapid-freezing methods that rely on cold air, cold contact surfaces, or immersion in a cooled liquid, none of which reach the ultra-low temperatures of cryogenic fluids. So the method described is cryogenic freezing.

When foods are frozen rapidly with extremely low temperatures using liquids like liquid nitrogen or carbon dioxide, the heat is removed so quickly that ice crystals form very small ones. This minimizes cell damage, preserves texture, and reduces drip loss, giving higher-quality frozen products. This approach is cryogenic freezing, distinguished from other rapid-freezing methods that rely on cold air, cold contact surfaces, or immersion in a cooled liquid, none of which reach the ultra-low temperatures of cryogenic fluids. So the method described is cryogenic freezing.