Detailed explanation and options for the selected question.
Which element is commonly known as "Quicklime"?
A.
Calcium Oxide
B.
Calcium Carbonate
C.
Calcium Hydroxide
D.
Calcium Sulfate
Explanation:
Quicklime is the common name for Calcium Oxide (CaO). Calcium Carbonate (CaCO3) is limestone, Calcium Hydroxide is slaked lime, and Calcium Sulfate is gypsum.