State true or false
In Hall's process for the preparation of `Al,` graphite anode has a long life.

Explanation

To determine whether the statement "In Hall's process for the preparation of Al, graphite anode has a long life" is true or false, we can analyze the process step by step.

### Step-by-Step Solution:

1. **Understanding Hall's Process**:
- Hall's process is an industrial method used for the extraction of aluminum from its ore, bauxite. In this process, aluminum oxide (Al₂O₃) is dissolved in molten cryolite (Na₃AlF₆) and electrolyzed.

2. **Role of the Anode**:
- In the electrolysis setup, graphite is used as the anode. The anode is where oxidation reactions occur, and in this case, it is where oxygen is produced.

3. **Production of Oxygen**:
- During the electrolysis, oxygen ions (O²⁻) from the aluminum oxide are oxidized at the anode to produce oxygen gas (O₂).

4. **Reaction with Graphite**:
- The produced oxygen gas reacts with the carbon in the graphite anode. This reaction can be represented as:
\[ C + O_2 \rightarrow CO_2 \]
- Additionally, carbon can also react with oxygen to form carbon monoxide (CO):
\[ 2C + O_2 \rightarrow 2CO \]

5. **Degradation of the Anode**:
- The continuous reaction of oxygen with the graphite leads to the degradation of the anode. As the carbon in the graphite reacts with oxygen, it gets consumed, resulting in the need for frequent replacement of the anode.

6. **Conclusion**:
- Since the graphite anode is continuously reacting with oxygen and degrading, it does not have a long life. Therefore, the statement is **false**.

### Final Answer:
**False**

---