A blood red colour is obtained when ferric chloride solution reacts with:

Options

A. `KCN`
B. `KSCN`
C. `K_(4)[Fe(CN)_(6)]`
D. `K_(3)[Fe(CN)_(6)]`

Answer

To solve the question regarding the blood red color obtained when ferric chloride solution reacts with a specific reagent, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The question mentions ferric chloride, which is represented as FeCl₃. We need to find out what it reacts with to produce a blood red color.

2. **Consider Possible Reagents**: The problem provides options, but we can start by recalling common reagents that react with ferric ions (Fe³⁺). One well-known reagent is potassium thiocyanate, which is KSCN.

3. **Write the Reaction**: When ferric chloride (FeCl₃) reacts with potassium thiocyanate (KSCN), the following reaction occurs:
\[ \text{FeCl}_3 + 3 \text{KSCN} \rightarrow \text{Fe(SCN)}_3 + 3 \text{KCl} \]
In this reaction, ferric thiocyanate (Fe(SCN)₃) is formed.

4. **Identify the Color**: Ferric thiocyanate is known to produce a blood red color in solution. This is a characteristic reaction used in qualitative analysis to confirm the presence of ferric ions.

5. **Conclusion**: Therefore, the correct answer to the question is that a blood red color is obtained when ferric chloride reacts with potassium thiocyanate (KSCN).

### Final Answer:
A blood red color is obtained when ferric chloride solution reacts with potassium thiocyanate (KSCN).

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