Latest NDA Aptitude Question SOLUTION: The most important raw material used in the manufacture of cement are
(A) Potassium nitrate, charcoal and sulphur
(B) Limestone, clay and gypsum
(C) Transition metal oxides, sodium
The most important raw material used in the manufacture of cement are
(A) Potassium nitrate, charcoal and sulphur
(B) Limestone, clay and gypsum
(C) Transition metal oxides, sodium hydroxide or potassium hydroxide
(D) Limestone, sodium carbonate and silica
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