Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron and sulphur, oxides of elements of which of the group (s) are present in the mixture

Explanation

To answer the question regarding the oxides present in cement, we need to identify the elements and their respective groups in the periodic table. Here’s a step-by-step solution:

### Step 1: Identify the main components of cement
Cement is primarily composed of several oxides. The question mentions calcium, iron, and sulfur oxides. We need to identify the oxides associated with these elements.

### Step 2: List the oxides of the mentioned elements
- **Calcium (Ca)**: The oxide is Calcium oxide (CaO).
- **Iron (Fe)**: The oxide is Iron(III) oxide (Fe2O3).
- **Sulfur (S)**: The oxide is Sulfur dioxide (SO2).

### Step 3: Identify additional oxides commonly found in cement
Besides the oxides of calcium, iron, and sulfur, there are other oxides that are typically present in cement:
- **Silicon (Si)**: The oxide is Silicon dioxide (SiO2).
- **Aluminum (Al)**: The oxide is Aluminum oxide (Al2O3).
- **Magnesium (Mg)**: The oxide is Magnesium oxide (MgO).

### Step 4: Determine the groups of these elements
Now, let’s identify the groups in the periodic table for each of the elements mentioned:
- **Calcium (Ca)**: Group 2 (Alkaline earth metals)
- **Iron (Fe)**: Group 8 (Transition metals)
- **Sulfur (S)**: Group 16 (Chalcogens)
- **Silicon (Si)**: Group 14 (Carbon group)
- **Aluminum (Al)**: Group 13 (Boron group)
- **Magnesium (Mg)**: Group 2 (Alkaline earth metals)

### Step 5: Conclusion
The oxides present in cement include those from Group 2 (Calcium and Magnesium), Group 13 (Aluminum), Group 14 (Silicon), and Group 16 (Sulfur). Therefore, the groups of elements whose oxides are present in cement are **Groups 2, 13, 14, and 16**.

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