Chemical formula of quick lime is ______.

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SSC CGL 2022 Tier-I Official Paper (Held On : 01 Dec 2022 Shift 1)
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  1. CaO
  2. CO2
  3. CaCO3
  4. Ca(OH)2

Answer (Detailed Solution Below)

Option 1 : CaO
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SSC CGL Tier 1 2025 Full Test - 01
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Detailed Solution

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The correct answer is CaO.

Key Points

  • The chemical formula for calcium oxide is CaO.
  • It is also known as quicklime, burnt lime, or quicklime.
  • It reacts with water to form calcium hydroxide.
  • The chemical formula for calcium hydroxide is Ca(OH)2. It is also known as hydrated lime or slaked lime.
  • It reacts with carbon dioxide to form calcium carbonate.

Important Points

  • Uses of  calcium oxide (CaO)
    • Quicklime is used in the Basic Oxygen Steelmaking (BOS) process.
    • Small amounts of quicklime are used in other processes such as the production of glass, calcium aluminate cement, and organic chemicals.
    • Calcium oxide (quick lime) is used in the production of cement.

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