Statement 1 is wrong because as temperature decreased, the carbon dioxide concentration also decreased which meant that the lizard’s respiratory rate also decreased. So the respiration rate of the lizard is NOT inversely proportional to the environmental temperature.
Statement 2 is wrong. We cannot determine whether the lizard is only respiring aerobically. It may also be respiring anaerobically.
Statement 3 is correct. The limewater test is a test for carbon dioxide and hence it can detect carbon dioxide in the air leaving the chamber.