Which is not the correct matching of emulsions :

Options

A. Milk : O/W
B. Cold cream : W/O
C. Butter : O/W
D. Vanishing cream : O/W

Answer

To solve the question "Which is not the correct matching of emulsions?", we will analyze the definitions and classifications of emulsions, and then evaluate the provided options.

### Step-by-Step Solution:

1. **Understand Emulsions**:
- Emulsions are colloidal systems consisting of two immiscible liquids.
- They can be classified into two main types:
- Oil in Water (O/W)
- Water in Oil (W/O)

2. **Identify the Components**:
- In an Oil in Water emulsion (O/W), oil is the dispersed phase and water is the continuous phase.
- In a Water in Oil emulsion (W/O), water is the dispersed phase and oil is the continuous phase.

3. **Examples of Emulsions**:
- **Oil in Water (O/W)**:
- Examples include milk and vanishing cream.
- **Water in Oil (W/O)**:
- Examples include butter and cold cream.

4. **Evaluate the Options**:
- We need to check each option given in the question to see if they match the correct classification of emulsions.
- For example:
- Milk is an O/W emulsion (Correct).
- Butter is a W/O emulsion (Correct).
- Cold cream is a W/O emulsion (Correct).
- If any option incorrectly matches an emulsion type, that will be our answer.

5. **Identify the Incorrect Match**:
- If we find an option that states a liquid that is known to be an O/W emulsion is incorrectly labeled as W/O or vice versa, that option is the answer.
- After evaluating the options, we find that the option stating "butter and water" is incorrect because butter is a W/O emulsion, not an O/W emulsion.

6. **Conclusion**:
- The option that is not the correct matching of emulsions is "butter and water".

### Final Answer:
The incorrect matching of emulsions is "butter and water".

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