Iodine test is used to detect

Options

A. fats
B. malaria
C. typhoid
D. carbohydrates

Answer

**Step-by-Step Solution:**

1. **Understanding the Iodine Test**: The iodine test is a chemical test used to identify the presence of starch in a sample.

2. **Principle of the Test**: The test works on the principle that iodine interacts with starch to produce a specific color change.

3. **Preparation of Iodine Solution**: Iodine is typically dissolved in an aqueous solution of potassium iodide. This solution is what is used for the test.

4. **Reaction with Starch**: When the iodine solution is added to a sample containing starch, the iodine molecules fit into the helical structure of the starch, forming a complex.

5. **Color Change Observation**: If starch is present, the solution will change to a characteristic blue-black color. If starch is absent, the solution will remain a brownish color.

6. **Conclusion**: Therefore, the iodine test is specifically used to detect the presence of starch, which is a type of carbohydrate.

7. **Final Answer**: The iodine test is used to detect carbohydrates, specifically starch.

---