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 composition of cement and the groups of elements whose oxides are present in it, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of Cement**:
Cement is primarily composed of various oxides. The question mentions that it contains oxides of calcium, iron, and sulfur. We need to identify other oxides that are typically found in cement.

2. **List Common Oxides in Cement**:
The main oxides present in Portland cement include:
- Calcium oxide (CaO)
- Silica (SiO2)
- Alumina (Al2O3)
- Iron(III) oxide (Fe2O3)
- Magnesium oxide (MgO)
- Sulfur trioxide (SO3)

3. **Determine the Groups of Elements**:
Now, we need to identify the groups in the periodic table that correspond to these oxides:
- **Calcium (Ca)** is in Group 2 (alkaline earth metals).
- **Aluminum (Al)** is in Group 13 (p-block elements).
- **Silicon (Si)** is in Group 14 (p-block elements).
- **Iron (Fe)** is in Group 8 (transition metals).
- **Magnesium (Mg)** is also in Group 2.

4. **Summarize the Groups Present**:
From the oxides listed:
- Group 2: Calcium (Ca), Magnesium (Mg)
- Group 13: Aluminum (Al)
- Group 14: Silicon (Si)
- Group 8: Iron (Fe)

5. **Final Conclusion**:
The oxides of elements from groups 2, 13, and 14 are present in the mixture of cement. Therefore, the correct answer is that cement contains oxides from Group 2, Group 13, and Group 14.

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

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