In a tabular form, write clearly two distinguishing tests or observations between CO and CO2

Explanation:

A blood test done soon after exposure to CO can detect if poisoning has occurred. However, it is not always possible to know how severe the poisoning has been or what long-term health problems might result. The effect of CO on any one person depends on the length of exposure, the concentration of the gas, and that person’s overall health condition.

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.