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Question

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?

A
Group 2 and 13
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B
Group 2, 13 and 14
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C
Group 2 and 14
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D
Group 2
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Solution

The correct option is B Group 2, 13 and 14

Cement is important building material.

It is produced by combining a material rich in lime, Cao with other material such as clay which contains silica, Sio2 along with Al2O3, Fe2O3, MgO and SO3.

Hence, besides CaO, Fe2O3 and SO3 oxides like Al2O3, SiO2 and MgO are also present.

Al member of group 13

Si member of group 14

Mg member of group 2

Hence, (B) is the correct option.


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