Oxygen in absorbed by molten Ag, which is evolved on cooling and the silver particles are scattered, this phenomenon is known as:

Options

A. silvering of mirror
B. spitting of silver
C. frosting of silver
D. hairing of silver

Answer

To solve the question regarding the phenomenon where oxygen is absorbed by molten silver (Ag) and is evolved upon cooling, leading to the scattering of silver particles, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Process**:
- The question describes a situation where molten silver absorbs oxygen. This absorption occurs when silver is in a molten state, meaning it is heated to a point where it becomes liquid.

2. **Cooling and Evolving Oxygen**:
- As the molten silver cools, the absorbed oxygen is released. This release of oxygen can cause the silver particles to scatter, indicating a physical change in the structure of the silver as it solidifies.

3. **Identifying the Phenomenon**:
- The phenomenon described is known as "spitting of silver." This term refers to the behavior of molten silver when it absorbs a significant amount of oxygen and then releases it upon cooling.

4. **Characteristics of Spitting of Silver**:
- It is noted that molten silver can dissolve up to 22 times its volume of oxygen. When this oxygen is released, it can lead to the scattering of silver particles.

5. **Controlling the Process**:
- The spitting of silver can be controlled by adding deoxidants, such as charcoal, to the molten silver. Additionally, covering the surface of the molten silver with non-oxidizing agents or traces of metals like copper, bismuth, or zinc can help manage this phenomenon.

6. **Conclusion**:
- Therefore, the correct answer to the question is that the phenomenon described is known as "spitting of silver."

### Final Answer:
The phenomenon is known as **spitting of silver**.