Carbon dioxide passed into limewater gives a milky solution. When you pass carbon dioxide through this solution, the two compounds carbon dioxide (CO2) and calcium hydroxide (CaOH2) will react to form white and insoluble calcium carbonate which precipitates out of the solution. It is due to the formation of (c) Two methods by which rusting of iron can be prevented are greasing and galvanization. (b) The chemical name of baking soda is Sodium bicarbonate (NaHCO 3). On passage of carbon dioxide, the lime water turns milky. Assertion: When air is passed through lime water, lime water turns milky. Lime water is the name for Calcium hydroxide. Lime water turns milky when you pass carbon dioxide through it because a reaction that produces a white precipitate takes place. When C O 2 is passed through lime water, it turns milky. It is usually used for testing of carbon dioxide and sulphur dioxide as both the gases turns lime water milky . The lime water test is used to detect the carbon dioxide gas. Explanation: hope this helps you please mark me as brainliest When excess of carbon dioxide is passed through lime water, the milkiness first formed disappears due to: View Answer "Calcium and barium bicarbonates are stable only in solution and decompose on removal of water … (a) Both … (a) When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate (CaCO 3). Lime water is the common name for Ca(OH) 2. Lime water is a saturated solution of calcium hydroxide. Chemistry Questions & Answers for Bank Exams : Lime water turns milky when carbon dioxide is passed through it. When CO2 gas is bubbled through the lime water there is a reaction that produces insoluble calcium carbonate - this white insoluble compound turns the solution milky . CaCO3 + CO2 + H2O --> Ca(HCO3)2 Reason: Air contains 78% nitrogen and 21% oxygen. The first reaction produces CaCO3 which is insoluble in water and hence the solution turns milky.If furthermore CO2 is passed,the CaCO3 reacts with the CO2 to form Ca(HCO3)2 which is soluble in water and hence the solution becomes colourless. The reactions are: Ca(OH)2 [lime water] + CO2 --> CaCO3 + H2O. when excess of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and solution become colourless. when CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate which formula is CaCO3. When Carbon dioxide is passed through Lime water or Calcium Hydroxide, it turns milky due to the formation of the Precipitate of the insoluble milky Calcium Carbonate. Equation: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l) Question 30.