Multiple choice general knowledge

'quicklime' actually is -

  1. calcium hydroxide

  2. calcium carbonate

  3. calcium oxide

  4. ferric oxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Quicklime is calcium oxide (CaO), produced by heating limestone (calcium carbonate) to high temperatures in a process called calcination. When water is added to quicklime, it undergoes an exothermic reaction to form slaked lime (calcium hydroxide). It's important not to confuse quicklime with limestone (calcium carbonate) or slaked lime (calcium hydroxide).

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