Oxygen gas relighting a glowing splint. ... When the glowing splint is introduced to the test tube, it bursts back into flame when it contacts the oxygen. Oxygen is the gas in the air that is responsible for maintaining combustion, which is a form of oxidation reaction.

Why does a lighted splint pop?

Hydrogen gas is highly flammable . You can safely test for small quantities of hydrogen gas (eg collected in a test tube) by holding a burning splint near to the top of the test tube. The positive result is a squeaky pop sound as the hydrogen reacts with oxygen in the air in a small explosion.

What does a glowing splint indicate?

Burning splints or glowing splints can be used to identify whether a gas is flammable, whether it is oxidising, or whether it is chemically inert.