Which is the oldest freezing method:

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Which is the oldest freezing method: Answer: Brine freezing

Brine freezing is considered the oldest method of freezing. It involves immersing the product in a cold brine (saltwater) solution. The high salt concentration lowers the freezing point of water, allowing the product to freeze quickly. This method has been used for decades, particularly in the seafood and meat industry, long before the development of advanced techniques like flash freezing or contact freezing.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.