Cement, the important building material is a mixture

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?

(i) group 2

(ii) groups 2, 13 and 14

(iii) groups 2 and 13

(iv) groups 2 and 14

Solution:

Option (ii) groups 2, 13 and 14 is the answer

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