Correct matching about composition of portland cement is List – I List -III) Al2O3 A) 50 - 60%II) CaO B) 20 - 25%III) SiO2 C) 5 - 10%IV) MgO D) 2 - 3%I II III IV

Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium aluminate (3CaO · Al2O3), and a tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3).

Correct matching about composition of portland cement is List – I List -III) Al2O3 A) 50 - 60%II) CaO B) 20 - 25%III) SiO2 C) 5 - 10%IV) MgO D) 2 - 3%I II III IV

Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium aluminate (3CaO · Al2O3), and a tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3).

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Correct matching about composition of portland cement is
List – I List -II
I) Al₂O₃ A) 50 - 60%
II) CaO B) 20 - 25%
III) SiO₂ C) 5 - 10%
IV) MgO D) 2 - 3%
I II III IV

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C A B D

A B C D

A C B D

C A D B

answer is A.

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Detailed Solution

Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO₂), dicalcium silicate (2CaO · SiO₂), tricalcium aluminate (3CaO · Al₂O₃), and a tetra-calcium aluminoferrite (4CaO · Al₂O₃Fe₂O₃).

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