Which one among the following is a chemical process ?

Options

A. Distillation of sea (salty) water
B. Crystallisation of impure salt (NaCl)
C. Production of Iodine `(I_(2))` from sea-weeds
D. Sublimation of iodine `(I_(2))`

Explanation

To determine which among the given options is a chemical process, we will analyze each option step by step.

### Step 1: Analyze the Distillation of Sea Salt Water
- **Explanation**: Distillation is a method used to separate components of a mixture based on differences in their boiling points. In this process, the chemical composition of the substances does not change; it remains the same.
- **Conclusion**: This is a physical process, not a chemical process.

### Step 2: Analyze the Crystallization of Impure Salt
- **Explanation**: Crystallization involves the formation of solid crystals from a solution. While impurities may be removed, the chemical composition of the salt (NaCl) remains unchanged.
- **Conclusion**: This is also a physical process.

### Step 3: Analyze the Production of Iodine (I2) from Sea Wet Weeds
- **Explanation**: The process of extracting iodine from sea wet weeds involves a chemical reaction where the sea weeds undergo a transformation to produce iodine. This process is irreversible, meaning the original materials cannot be easily recovered.
- **Conclusion**: This is a chemical process.

### Step 4: Analyze the Sublimation of Iodine
- **Explanation**: Sublimation is the transition of a substance from solid to gas without passing through a liquid state. The chemical composition of iodine does not change during sublimation.
- **Conclusion**: This is a physical process.

### Step 5: Analyze the Distillation of Iodine
- **Explanation**: Similar to the distillation of sea salt water, distillation of iodine involves separating iodine from other components based on boiling points, without changing its chemical composition.
- **Conclusion**: This is a physical process.

### Final Conclusion:
Among the options provided, the **production of iodine (I2) from sea wet weeds** is the only chemical process.

### Answer:
The correct answer is the production of iodine (I2) from sea wet weeds.

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