Q: The raw materials used for the manufacture of Portland cement are
(a)Lime, silica and sulphur dioxide
(b)Lime, silica and carbon dioxide
(c)Lime, silica and alumina
(d)Lime, silica and boric acid
Correct Answer: (c)
The correct answer is (a) 'Lime, silica and sulphur dioxide'. This question from the Science & Technology domain tests knowledge of Chemistry.