Which of the following are not used as food preservatives?

Options

A. Table salt
B. Sodium hydrogencarbonate
C. Cane sugar
D. Benzoic acid

Answer

To determine which of the following substances are not used as food preservatives, we will analyze each option provided.

### Step 1: Understand the function of food preservatives
Food preservatives are substances added to food to prevent spoilage caused by microorganisms or to slow down the oxidation of fats, which can lead to rancidity.

### Step 2: Analyze each option
1. **Table Salt**:
- Table salt is commonly used as a food preservative. It helps in inhibiting the growth of bacteria and other microorganisms. Therefore, it is **used as a food preservative**.

2. **Sodium Hydrogen Carbonate (Baking Soda)**:
- Sodium hydrogen carbonate is primarily used as a leavening agent in baking. It is not typically used for preserving food. Therefore, it is **not used as a food preservative**.

3. **Cane Sugar**:
- Cane sugar can act as a preservative in some contexts (like in jams and jellies) due to its ability to inhibit microbial growth by osmosis. However, it is not commonly recognized as a food preservative in the same way as others like salt or benzoic acid. Therefore, it is **not primarily used as a food preservative**.

4. **Benzoic Acid**:
- Benzoic acid is a well-known food preservative that is effective against yeast and mold. Therefore, it is **used as a food preservative**.

### Conclusion:
From our analysis, the substances that are **not used as food preservatives** are:
- Sodium Hydrogen Carbonate
- Cane Sugar

### Final Answer:
Sodium Hydrogen Carbonate and Cane Sugar are not used as food preservatives.

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