Find the number of type of metals present in a mixture of ore containing sylvinite, Indian saltpetre, colemaite, dolomite and anglesite.

Answer

To find the number of types of metals present in the given mixture of ores, we will analyze each ore and identify the metals they contain.

### Step-by-Step Solution:

1. **Identify Metals in Sylvinite**:
- Sylvinite is a mixture primarily composed of potassium chloride (KCl) and sodium chloride (NaCl). However, it is often associated with potassium (K) as the metal of interest.
- **Metal(s) present**: Potassium (K)

2. **Identify Metals in Indian Saltpetre**:
- Indian saltpetre, also known as potassium nitrate (KNO3), contains potassium (K) as the metal.
- **Metal(s) present**: Potassium (K)

3. **Identify Metals in Colemaite**:
- Colemaite is a mineral with the formula (Te2O6)(S2). It contains tellurium (Te) as the metal.
- **Metal(s) present**: Tellurium (Te)

4. **Identify Metals in Dolomite**:
- Dolomite is a carbonate mineral composed of calcium magnesium carbonate (CaMg(CO3)2). It contains both calcium (Ca) and magnesium (Mg) as metals.
- **Metal(s) present**: Calcium (Ca) and Magnesium (Mg)

5. **Identify Metals in Anglesite**:
- Anglesite is a lead sulfate mineral with the formula PbSO4. It contains lead (Pb) as the metal.
- **Metal(s) present**: Lead (Pb)

### Summary of Metals Identified:
- From Sylvinite: Potassium (K)
- From Indian Saltpetre: Potassium (K)
- From Colemaite: Tellurium (Te)
- From Dolomite: Calcium (Ca) and Magnesium (Mg)
- From Anglesite: Lead (Pb)

### Total Unique Metals:
- Potassium (K)
- Tellurium (Te)
- Calcium (Ca)
- Magnesium (Mg)
- Lead (Pb)

Thus, the total number of unique types of metals present in the mixture is **5**.

### Final Answer:
**The number of types of metals present in the mixture is 5.**

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