Question : Which of the following is commonly known as quicklime?
Option 1: CaSO4
Option 2: CaCl2
Option 3: Ca(OH)2
Option 4: CaO
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Correct Answer: CaO
Solution : The correct answer is CaO.
Calcium oxide (CaO) is commonly known as quicklime. Quicklime is a white, crystalline solid at room temperature and is produced by heating calcium carbonate (CaCO3), typically in the form of limestone, in a process called calcination. The chemical reaction is as follows:
CaCO3 → CaO + CO2
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Question : Which of the following is soda lime?
Option 1: Ca(OH)2 + CaO
Option 2: KOH + CaO
Option 3: CaCl2 + CaO
Option 4: NaOH + CaO
Question : The chemical formula of bleaching powder is ______.
Option 1: CaOCl2
Option 2: CaO
Option 3: CaCO3
Option 4: Ca(OH)2
Question : The chemical formula of quick lime is__________.
Option 1: CaO
Option 2: CO2
Question : The chemical formula of gypsum is ______.
Option 1: CaSO4.2H2O
Option 2: CaSO4.H2O
Option 3: CaSO4
Option 4: CaSO4.(1/2)H2O
Question : The chemical formula of Gypsum is _________.
Option 1: CaSO4.12H2O
Option 2: MgSO4.12H2O
Option 3: MgSO4.2H2O
Option 4: CaSO4.2H2O
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