Chemistry PYQ 232 of 291 · Everyday Chemistry

What is the common name of Calcium Hydroxide?

  1. ALime water
  2. BBaking soda
  3. CSlaked lime
  4. DMore than one of the above
  5. ENone of the above

BPSC TRE-3 (Jul 2024)

Show answer and explanation

Correct answer: (c) Slaked lime

Explanation

Calcium hydroxide, Ca(OH)₂, is called slaked lime. It is made by adding water to quicklime: CaO + H₂O → Ca(OH)₂.

Limewater is a clear solution of calcium hydroxide in water, not the compound itself. Baking soda is sodium bicarbonate, NaHCO₃.

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