Each of these solution is added to a mixture of aqueous solution oof iodide and chloroform test for iodine when the solution are vigeorrously mixed?

Options

A. NaCI solution
B. NaBr solution
C. Chloride water
D. Bromine water

Explanation

To determine which solutions will give a positive test for iodine when added to a mixture of aqueous iodide and chloroform, we will analyze each option step-by-step.

### Step 1: Understand the Components
We have a mixture of aqueous iodide (I⁻) and chloroform. The purpose is to identify which of the given solutions can oxidize iodide ions (I⁻) to iodine (I₂), which will produce a violet color in the chloroform layer.

### Step 2: Analyze Each Option
1. **NaCl Solution**:
- Contains Na⁺ and Cl⁻ ions.
- Cl⁻ does not act as an oxidizing agent; it cannot oxidize I⁻ to I₂.
- **Conclusion**: NaCl solution will not give a positive test for iodine.

2. **NaBr Solution**:
- Contains Na⁺ and Br⁻ ions.
- Br⁻ also does not act as an oxidizing agent; it cannot oxidize I⁻ to I₂.
- **Conclusion**: NaBr solution will not give a positive test for iodine.

3. **Chlorine Water (Cl₂)**:
- Contains Cl₂, which has an oxidation state of 0.
- Cl₂ can act as an oxidizing agent and will oxidize I⁻ to I₂.
- The formation of I₂ will result in a violet color in the chloroform layer.
- **Conclusion**: Chlorine water will give a positive test for iodine.

4. **Bromine Water (Br₂)**:
- Contains Br₂, which also has an oxidation state of 0.
- Br₂ can act as an oxidizing agent and will oxidize I⁻ to I₂.
- The formation of I₂ will again result in a violet color in the chloroform layer.
- **Conclusion**: Bromine water will give a positive test for iodine.

### Final Conclusion
The solutions that will give a positive test for iodine are:
- **Chlorine Water (Option C)**
- **Bromine Water (Option D)**

### Summary
- **Option A (NaCl)**: No positive test for iodine.
- **Option B (NaBr)**: No positive test for iodine.
- **Option C (Chlorine Water)**: Positive test for iodine.
- **Option D (Bromine Water)**: Positive test for iodine.