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Chemistry Medium FPSC PPSC NTS Uploaded: 14 Jul 2026

What is the chemical formula for calcium hydroxide also known as slaked lime?

  • A CaO
  • B CaCO3
  • C Ca(OH)2
  • D CaCl2
Correct Answer: Option C — Ca(OH)2
Explanation:
Calcium hydroxide Ca(OH)2 also called slaked lime is made by adding water to quicklime CaO and is used in construction water treatment and to neutralise acidic soils.
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