ooo New Question To test for the presence of carbon dioxide, one should use -(1) - and the solution will go from -(2)- if carbon dioxide is present. 1: calcium carbonate; 2:cloudy to colourless 1: limewater; 2: cloudy to colourless 1: limewater; 2: colourless to cloudy 1: calcium carbonate 2: colourless to cloudy

## Step 1:To test for the presence of carbon dioxide, one commonly used method involves limewater. Limewater is a solution of calcium hydroxide (\(\text{Ca(OH)}_2\)).## Step 2:When carbon dioxide ( ) is bubbled through limewater, a chemical reaction occurs. The reaction is as follows:### This reaction produces calcium carbonate ( ), which is insoluble in water and forms a white precipitate, making the solution appear cloudy.## Step 3:Thus, if carbon dioxide is present, the limewater will go from colorless to cloudy due to the formation of calcium carbonate.#