Which of the following is the main ingredient of cement?
Detailed Explanation:
Cement is manufactured using multiple key ingredients, making Option 5 the correct choice. The primary component is limestone (~60–65%), which provides calcium oxide. Silica clay (~20–25%) supplies silica, alumina, and iron oxide. Gypsum (~3–5%) is added post-burning to regulate setting time.
Since limestone, silica clay, and gypsum are all essential ingredients—not just one—the answer cannot be a single option.
Therefore, more than one ingredient is correct, making Option 5 the correct answer.
Question 7 of 10 Everyday Chemistry
Practice PYQ questions from this topic across all years
Which one of the following is an example of melamine used for making floor tiles?
Select the incorrect statement out of the following