<prompt> The most impoant constituent in soda lime for reabsorption of CO2 in a closed circuitSodium hydroxideBarium hydroxideCalcium hydroxidePotassium hydroxide  <response>: Sodalime is most common Co2 absorbant . Indicators added to sodalime changes the color of sodalime . It contains 94 CaOH2 , 5NaOH,1 KOH. 