Which of the following is used for the preservation of colourless food materials such as fruit juices , squashes ?

Options

A. Potassium metalbisulphite
B. Sodium sulphate
C. Sodium benzoate
D. all of the above

Answer

To solve the question of which substance is used for the preservation of colorless food materials such as fruit juices and squashes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a preservative specifically used for colorless food materials like fruit juices and squashes.

2. **Identify Common Preservatives**: Familiarize yourself with common food preservatives. Some of the commonly used preservatives include:
- Benzoic acid and its salts
- Potassium sorbate
- Sodium benzoate
- Potassium metabisulfite

3. **Focus on Colorless Food Materials**: Since the question specifies colorless food materials, we need to consider which preservatives are effective for such items.

4. **Research Potassium Metabisulfite**: Potassium metabisulfite is known for its use in preserving colorless food items. It works by releasing sulfur dioxide (SO2) when it reacts with the acids present in the juice.

5. **Mechanism of Action**: The sulfur dioxide released acts as an antimicrobial agent, effectively killing harmful microorganisms that can spoil the food. This makes it particularly suitable for preserving fruit juices and squashes.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is **Potassium Metabisulfite**.

### Final Answer:
The preservative used for the preservation of colorless food materials such as fruit juices and squashes is **Potassium Metabisulfite**.

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