Which gas relights a glowing splint?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Which gas relights a glowing splint?

Explanation:
A glowing splint relights only in a gas that can support combustion. Oxygen is the one that does this most readily: its high availability around the hot splint allows oxidation to continue, so the splint rekindles. In carbon dioxide, there’s no oxygen to support burning, and it can displace air, so the splint stays extinguished. Ammonia doesn’t act as an oxidizer that would reignite the glow under normal conditions. Hydrogen is highly flammable, but a glowing splint alone isn’t enough to ignite it; it typically needs a stronger ignition source. So the gas that makes a glowing splint relight is oxygen.

A glowing splint relights only in a gas that can support combustion. Oxygen is the one that does this most readily: its high availability around the hot splint allows oxidation to continue, so the splint rekindles.

In carbon dioxide, there’s no oxygen to support burning, and it can displace air, so the splint stays extinguished. Ammonia doesn’t act as an oxidizer that would reignite the glow under normal conditions. Hydrogen is highly flammable, but a glowing splint alone isn’t enough to ignite it; it typically needs a stronger ignition source.

So the gas that makes a glowing splint relight is oxygen.

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