Identify the reagent used to test starch.

Options

A. Salt
B. Fluorine
C. Iodine
D. Caustic soda

Explanation

**Step-by-Step Solution:**

1. **Understanding the Test for Starch**: The test for starch involves using a specific reagent that reacts with starch to produce a noticeable color change.

2. **Identifying the Reagent**: The reagent commonly used to test for the presence of starch is iodine solution.

3. **Conducting the Test**: To perform the test, you take the food material you want to test and add 2-3 drops of iodine solution to it.

4. **Observing the Color Change**: After adding the iodine solution, observe the color of the mixture. If starch is present, the color will change to blue-black.

5. **Conclusion**: Based on the color change, you can conclude that starch is present in the food material. Therefore, the reagent used to test for starch is iodine solution.

**Final Answer**: The reagent used to test starch is iodine solution.

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