What are the basic components of Portland cement?

PYQ SSC JE (Junior Engineer) 2023

1. A.

   CaOCl3, MgSO4, Al2(SO4)3, ZnSO4

2. B.

   ZnSO4, CaCl2, Al2(SO4)3, CuSO4

3. C.

   CaO, SiO2, Al2O3, Fe2O3

4. D.

   CaCl2, MgCl2, Al2(SO4)3, ZnSO4

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