A metal salt solution gives raddish brown precipitate with ammonium hydroxide hydroxide and deep red solouration with ammonium thiocyanate reagent. The metal ion is `:`

Options

A. `Ni^(2+)`
B. `Cu^(2+)`
C. `Fe^(3+)`
D. `As^(3+)`

Explanation

To solve the question regarding the metal salt solution that gives a reddish-brown precipitate with ammonium hydroxide and a deep red coloration with ammonium thiocyanate, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Precipitate with Ammonium Hydroxide:**
- The reddish-brown precipitate formed when a metal salt solution is treated with ammonium hydroxide indicates the presence of ferric ions (Fe³⁺).
- The reaction can be represented as:
\[ \text{Fe}^{3+} + 3 \text{OH}^- \rightarrow \text{Fe(OH)}_3 \, (\text{reddish-brown precipitate}) \]

2. **Identify the Color Change with Ammonium Thiocyanate:**
- The deep red coloration observed when the same solution is treated with ammonium thiocyanate (NH₄SCN) also suggests the presence of ferric ions.
- The reaction can be represented as:
\[ \text{Fe}^{3+} + 3 \text{SCN}^- \rightarrow \text{Fe(SCN)}_3 \, (\text{deep red coloration}) \]

3. **Conclusion:**
- Since both tests (reddish-brown precipitate with ammonium hydroxide and deep red coloration with ammonium thiocyanate) point to the presence of ferric ions (Fe³⁺), we can conclude that the metal ion in the solution is **ferric ion (Fe³⁺)**.

4. **Select the Correct Option:**
- Based on the analysis, the correct answer is **C (Fe³⁺)**.