How many cations are placed in `6^(th)` group?

Answer

To determine how many cations are placed in the sixth group of qualitative analysis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification of Cations**:
- Cations are classified into different groups based on their precipitation reactions in qualitative analysis. The sixth group is one of these classifications.

2. **Identify the Groups**:
- The groups are typically numbered from 0 to 6 in qualitative analysis. Each group contains specific cations that can be detected through various tests.

3. **List the Cations in the Sixth Group**:
- In the sixth group, we need to identify which cations are included. The common cation in the sixth group is **Mg²⁺** (Magnesium ion).

4. **Count the Cations**:
- After identifying the cations in the sixth group, we can count them. In this case, there is only **one cation** in the sixth group.

5. **Conclude the Answer**:
- Therefore, the answer to the question of how many cations are placed in the sixth group is **1**.

### Final Answer:
There is **1 cation** in the sixth group, which is **Mg²⁺**.

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