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 ?

Options

A. Group 2
B. Groups 2, 13 and 14
C. Groups 2 and 13
D. Groups 2 and 14

Explanation

To solve the question regarding the oxides present in cement besides calcium, iron, and sulfur, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of Cement**:
Cement is primarily composed of various oxides. The main oxides include calcium oxide (CaO), silicon dioxide (SiO2), aluminum oxide (Al2O3), iron oxide (Fe2O3), sulfur dioxide (SO2), and magnesium oxide (MgO).

2. **List the Oxides Present**:
- Calcium oxide (CaO)
- Silicon dioxide (SiO2)
- Aluminum oxide (Al2O3)
- Iron oxide (Fe2O3)
- Sulfur dioxide (SO2)
- Magnesium oxide (MgO)

3. **Determine the Groups of the Elements**:
- **Calcium (Ca)**: Group 2 (alkaline earth metals)
- **Silicon (Si)**: Group 14 (carbon group)
- **Aluminum (Al)**: Group 13 (boron group)
- **Iron (Fe)**: Transition metal (not in the specified groups)
- **Sulfur (S)**: Group 16 (chalcogens, not in the specified groups)
- **Magnesium (Mg)**: Group 2 (alkaline earth metals)

4. **Exclude Calcium, Iron, and Sulfur**:
Since the question specifies to exclude calcium, iron, and sulfur, we focus on the remaining oxides:
- Silicon (Si) from SiO2 (Group 14)
- Aluminum (Al) from Al2O3 (Group 13)
- Magnesium (Mg) from MgO (Group 2)

5. **Conclusion**:
The oxides present in cement, besides calcium, iron, and sulfur, come from:
- Group 2 (Magnesium)
- Group 13 (Aluminum)
- Group 14 (Silicon)

Thus, the answer to the question is that the oxides of elements from Group 2, Group 13, and Group 14 are present in the mixture.

### Final Answer:
The oxides of elements from Group 2, Group 13, and Group 14 are present in the mixture.

---