Question

Give tests for oxygen gas.

Answer 1

As we know that the oxygen is a non-toxic, colourless and odourless gas. Oxygen supports combustion which is referred to as "burning". During the combustion reaction, oxygen enters into a chemical reaction with a combustible agent. Oxygen is one of the most reactive of all elements; it reacts with various compounds.

Complete answer:
As we know that the test for oxygen supports combustion hence the best way to detect its presence is the glowing splint test.
In glowing splint test- The light strip test is for oxidizing gases such as oxygen. In this test, the splint is ignited and allowed to burn for a few seconds, then blown out or shaken out of the mouth.
If the top row is still hot, a splint is inserted into the gas sample collected in the container. Coal exposed to concentrated oxygen gas ignites and ignites again, creating a stable flame which indicates the presence of oxygen.
The higher the oxygen concentration, the faster the wood burns and the stronger the flame. This test is not limited to oxygen, it reacts similarly to oxidizing gases (e.g., nitric oxide) that cause splint burns.
We have to know that the several laboratory tests have shown that the aquatic plant Myriophyllum spicatum produces pyrogallic acid. In alkaline solutions, it absorbs oxygen from the air and turns brown in colourless solutions. In particular, it can be used to calculate the amount of oxygen in air using the Orsat instrument.
We must remember that the oxygen is mixed with nitric oxide gas which is colourless after reaction nitrogen dioxide is produced accompanied by reddish brown fumes.
Nitrogen dioxide is usually obtained from atmospheric oxygen by oxidizing nitrogen oxides.
$2NO + {O_2} \to 2N{O_2}$
Hence, from these tests we can detect the presence of oxygen.

Note: We must remember that the glowing splint test is a simple yet effective oxygen test. Confusion sometimes occurs because the rails can easily burst when restarted. It is sometimes mistaken for hydrogen. The explosions of hydrogen are much louder and sometimes enough to completely shut off the tires.