66th B.P.S.C. (Pre) 2020
Limewater is turned milky by:
aCO
bCO2✓ Correct
cO2
dO3
eNone of the above / More than one of the above
Explanation
Limewater is the common name for a saturated aqueous solution of calcium hydroxide. When carbon dioxide gas is passed through limewater, it turns milky. Ca(OH)2 + CO2 → CaCO3 + H2O
general-science