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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
MCQ
Calcium hydroxide reacts with $...........$ in air to form calcium carbonate.
  • A
    Oxygen
  • ✓
    Carbon dioxide
  • C
    Ozone
  • D
    Nitrogen
✓

Answer

Correct option: B.
Carbon dioxide
Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls.

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