Compounds capable of reacting with ammoniacal `AgNO_(3)` solution
are

Options

A. `CH_(3)-underset(CH_(3))underset(|)(CH)-C-=CH`
B. `HC-=CH`
C. `1-"Butyne"`
D. all the above

Answer

To determine which compounds are capable of reacting with ammoniacal AgNO₃ solution, we need to analyze the nature of the compounds provided and their reactivity with this reagent, specifically focusing on terminal alkynes.

### Step-by-Step Solution:

1. **Understanding Ammoniacal AgNO₃**:
- Ammoniacal silver nitrate solution, also known as Tollens' reagent, is used to test for terminal alkynes. Terminal alkynes have a triple bond (C≡C) at the end of the carbon chain.

2. **Identifying Terminal Alkynes**:
- Terminal alkynes have the general formula R-C≡C-H, where R can be any alkyl group. The key feature is that the triple bond is at the end of the carbon chain.

3. **Analyzing the Given Compounds**:
- If the question provides specific compounds, we need to check if they are terminal alkynes. For example:
- **Compound A**: R-C≡C-H (Terminal Alkyne)
- **Compound B**: R-C≡C-R' (Internal Alkyne, does not react)
- **Compound C**: R-C≡C-H (Terminal Alkyne)
- **Compound D**: R-C≡C-R' (Internal Alkyne, does not react)

4. **Reactivity with Ammoniacal AgNO₃**:
- Only terminal alkynes will react with ammoniacal silver nitrate to form a silver alkanide and a white precipitate of silver. The reaction can be represented as:
\[ R-C≡C-H + 2Ag(NH_3)_2^+ + OH^- \rightarrow R-C≡C-Ag + 2NH_3 + H_2O \]
- The product is a silver alkanide, which is a white precipitate.

5. **Conclusion**:
- Based on the analysis, if all the given compounds are terminal alkynes, they will react with ammoniacal AgNO₃. Therefore, the answer would be "All of the above" if all provided compounds are terminal alkynes.

### Final Answer:
Compounds capable of reacting with ammoniacal AgNO₃ solution are **all terminal alkynes**.

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