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Raw vegetables to be preserved in deep f...

Raw vegetables to be preserved in deep freezes must be pretreated with

A

Food preservatives

B

Sprayed with disinfectants

C

Dipped in hot water

D

All the above

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The correct Answer is:
To answer the question regarding the pretreatment of raw vegetables before preservation in deep freezers, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Preservation Needs**: Raw vegetables need to be preserved to maintain their quality, flavor, and nutritional value when stored in deep freezers. 2. **Identifying Common Methods**: There are various methods for preserving vegetables, including the use of food preservatives and disinfectants. However, these methods can be harmful and are not suitable for regular use. 3. **Exploring Effective Techniques**: One effective method for preparing vegetables for freezing is to use a technique called scalding. This involves briefly exposing the vegetables to hot water or steam. 4. **Scalding Process**: During scalding, vegetables are dipped in hot water for a short period. This process helps to kill surface bacteria and deactivate enzymes that can lead to spoilage and degradation of quality. 5. **Benefits of Scalding**: By scalding the vegetables, we can help preserve their color, flavor, and texture, which might otherwise be affected during freezing due to enzyme activity, even at low temperatures. 6. **Conclusion**: Therefore, the correct pretreatment for raw vegetables before freezing is to dip them in hot water, which is known as scalding. ### Final Answer: Raw vegetables to be preserved in deep freezers must be pretreated with **hot water (scalding)**. ---
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