Quicklime has the formula ______
Quicklime has the formula ______
- A)Ca(OH)\(_2\)
- B)CaO
- C)CaCO\(_3\)
- D)CaSO\(_4\).2H\(_2\)O
Correct Answer: B)CaO
Explanation
Quicklime is a common name for calcium oxide, which has the chemical formulaCaO. It is a white, caustic, alkaline substance that can absorb water and carbon dioxide from the atmosphere. Quicklime is produced by heating limestone (calcium carbonate, CaCO3) in a process called calcination or lime-burning.
Let's briefly discuss the other options to understand why they are not correct:
Option A: Ca(OH)2 is calcium hydroxide, also known as slaked lime or hydrated lime. It is formed when quicklime (CaO) reacts with water.
Option C: CaCO3 is calcium carbonate, commonly found in rocks as limestone, marble, and chalk. It is the starting material in the production of quicklime.
Option D: CaSO4.2H2O is calcium sulfate dihydrate, also known as gypsum. It is used in the construction industry to make plaster and wallboard.
Option E: CaCl2 is calcium chloride, a salt commonly used as a de-icing agent and as a drying agent in various industrial processes.
In summary, the correct formula for quicklime isCaO.