A mixture of red and blue ink can be separated by

Options

A. Distillation
B. Crystallisation
C. Chromatography
D. Sublimation

Answer

To solve the question "A mixture of red and blue ink can be separated by," we will analyze the options provided and determine the most suitable method for separation.

### Step-by-Step Solution:

1. **Understanding the Mixture**:
- We have a mixture of red and blue ink. Inks are typically composed of various dyes that can have different properties.

2. **Evaluating the Methods**:
- **Option A: Distillation**:
- This method separates components based on differences in boiling points. However, inks are not usually separated this way because they do not have significantly different boiling points and may decompose upon heating.
- **Option B: Crystallization**:
- This process is used to separate solids from a solution based on differences in solubility. Since inks are liquids and not solids, this method is not applicable.
- **Option C: Chromatography**:
- Chromatography is a technique used to separate components of a mixture based on their movement through a stationary phase while being carried by a mobile phase. This method is commonly used for separating different dyes in inks.
- **Option D: Sublimation**:
- Sublimation involves the transition of a substance from solid to gas without passing through a liquid phase. This is not applicable for separating liquid inks.

3. **Conclusion**:
- After evaluating all the options, the most appropriate method for separating a mixture of red and blue ink is **Option C: Chromatography**.

### Final Answer:
A mixture of red and blue ink can be separated by **chromatography**.

---