Is CaO or Ca(OH)₂ used for whitewashing?
GeneralClass 10CBSEAnswered 20 May 2026
Answer
Ca(OH)₂ (slaked lime) is used CaO is too reactive to apply directly. After application, Ca(OH)₂ reacts with atmospheric CO₂ to form hard, white CaCO₃:
Ca(OH)₂ + CO₂ → CaCO₃ + H₂OSuggested Q&A
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