For each gas exist a specific test; a general method is based on the infrared spectrometry.
Carbon Dioxide. You can prove it by collecting some of the gas in a test tube (the gas is heavier than air). Drop a lighted splint into the test tube, and the flame will be extinguished.
One common method to test for the presence of hydrogen gas is the "pop test." Collect a sample of the gas in a container, then introduce a flame. If hydrogen is present, it will burn with a pop sound. Another method is to use a colorless, odorless gas detector that can detect hydrogen gas in the air.
compression test
Test tube mouth up: nothingTest tube mouth down: the denser gas can escape
One way to test if a gas is hydrogen is by using a lit splint test. This involves carefully introducing the gas to a lit splint and observing if it produces a characteristic "squeaky pop" sound, which is indicative of hydrogen gas. Another method is using a hydrogen gas sensor or detector that can specifically detect the presence of hydrogen in the air.
a place where you test gas
You can test for the presence of oxygen gas by using a glowing splint test. A glowing splint will reignite in the presence of oxygen. Alternatively, you can use a chemical reaction like the decomposition of hydrogen peroxide, which produces oxygen gas bubbles. Additionally, you can use an oxygen gas sensor to directly measure the presence of oxygen in the air.
You can test it with the Lime Water test. If there is carbon dioxide in your breath then the Lime Water should turn cloudy.
A gas particle analyzer, sometimes called a Freon Leak Detector; depending on how small the traces are.
Gas produced during reaction will produce bubbles due to the property of surface tension of the liquid. Air or gas is less denser than the liquid in which it is produced. Also due to Archimedes principle, the weight of the liquid displaced by the air or gas bubble will be more than that of bubble itself. So upward buoyant force is heavy which pushes the bubbles to the top of the test tube.
A pneumatic test is a type of pressure test where the vessel is pressurized using air or another gas to check for leaks or structural integrity. An air test is a specific type of pneumatic test where only air is used as the test medium. In both tests, the pressure vessel is pressurized, but the distinction lies in the specific medium used for pressurization.
Primary air is the air that mixes with the gas before the gas is burned.