The most impoant constituent in soda lime for reabsorption of CO2 in a closed circuit: (A) Sodium hydroxide, (B) Barium hydroxide, (C) Calcium hydroxide, (D) Potassium hydroxide
Answer is C. Sodalime is most common Co2 absorbant . Indicators added to sodalime changes the color of sodalime . It contains 94% Ca(OH)2 , 5%NaOH,1% KOH.