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In the average composition of portland cement, the percentage of magnesium oxide is a ___________(a) 3 to 4%(b) 2 to 3%(c) 4 to 5%(d) 1 to 2%I got this question during an online exam.This is a very interesting question from s-Block Elements topic in division s-Block Elements of Chemistry – Class 11 |
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Answer» Correct choice is (b) 2 to 3% |
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