Metals present in permutit are

Options

A. Na and K
B. Na and Al
C. Al and K
D. K and Al

Explanation

To determine the metals present in permutit, we can follow these steps:

### Step 1: Understand what permutit is
Permutit, also known as zeolite, is a type of hydrated sodium aluminosilicate.

### Step 2: Identify the chemical formula
The chemical formula of permutit can be represented as:
\[ \text{Na}_2\text{O} \cdot \text{Al}_2\text{O}_3 \cdot \text{XSiO}_2 \cdot \text{YSO}_2 \]
This indicates that sodium (Na) and aluminum (Al) are part of the structure.

### Step 3: Analyze the options
Now, we need to look at the options given in the question to identify which metals are present in permutit.

1. **Option 1: Sodium and Potassium**
- Sodium is present, but potassium is not mentioned in the formula. **(Incorrect)**

2. **Option 2: Sodium and Aluminum**
- Both sodium and aluminum are present in the formula. **(Correct)**

3. **Option 3: Aluminum and Potassium**
- Aluminum is present, but potassium is not. **(Incorrect)**

4. **Option 4: Potassium and Aluminum**
- Aluminum is present, but potassium is not. **(Incorrect)**

### Step 4: Conclusion
From the analysis, the only correct option is **Option 2: Sodium and Aluminum**.