Which of the following carbides consists of `C^(4-)` type of anionic part?

Options

A. `AI_(4)C_3`
B. `CaC_2`
C. `B_4C`
D. `Mg_2C_3`

Answer

To determine which of the given carbides consists of a `C^(4-)` type of anionic part, we need to analyze the structure of each carbide mentioned in the question.

### Step-by-Step Solution:

1. **Identify the Carbides**: The carbides given in the question are Al4C3, CaC2, and Mg2C3.

2. **Analyze Al4C3**:
- Al4C3 can be dissociated into ions:
\[ Al^{3+} + C^{4-} \]
- This indicates that Al4C3 contains `C^(4-)` as the anionic part.

3. **Analyze CaC2**:
- CaC2 can be dissociated into ions:
\[ Ca^{2+} + C_2^{2-} \]
- Here, the anionic part is `C_2^{2-}`, which does not correspond to `C^(4-)`.

4. **Analyze Mg2C3**:
- Mg2C3 can be dissociated into ions:
\[ Mg^{2+} + C_3^{4-} \]
- In this case, the anionic part is `C_3^{4-}`, which also does not correspond to `C^(4-)`.

5. **Conclusion**:
- Among the carbides analyzed, only Al4C3 contains `C^(4-)` as the anionic part.

### Final Answer:
The carbide that consists of `C^(4-)` type of anionic part is **Al4C3**.