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?

G r o u p 2 a n d 13

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G r o u p 2, 13 a n d 14

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G r o u p 2 a n d 14

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G r o u p 2

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Solution

The correct option is B $G r o u p 2, 13 a n d 14$

Cement is important building material.

It is produced by combining a material rich in lime, $C a o$ with other material such as clay which contains silica, Sio2 along with $A l_{2} O_{3}, F e_{2} O_{3}, M g O a n d S O_{3}$ .

Hence, besides $C a O, F e_{2} O_{3}$ and $S O_{3}$ oxides like $A l_{2} O_{3}, S i O_{2}$ and $M g O$ are also present.

$A l \to m e m b e r o f g r o u p 13$

$S i \to m e m b e r o f g r o u p 14$

$M g \to m e m b e r o f g r o u p 2$

Hence, (B) is the correct option.

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