Which of the following gives blood red colour with KCNS?

Options

A. `Cu^(2+)`
B. `Fe^(3+)` ions
C. `Al^(3+)`
D. `Zn^(2+)`

Explanation

To solve the question "Which of the following gives blood red color with KCNS?", we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Reaction**: The question is asking which compound reacts with potassium thiocyanate (KCNS) to produce a blood red color. This is a specific type of reaction known as the "Laseigne test," which is used to identify the presence of certain metal ions.

2. **Identify the Key Ion**: The ion that is known to produce a blood red color when reacted with KCNS is the ferric ion (Fe³⁺). When Fe³⁺ reacts with KCNS, it forms a complex ion, which is responsible for the characteristic blood red color.

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