Learn about hydrogen's properties, preparation, and its uses in daily life and industry.
Hydrogen is a colourless, odourless gas, lighter than air, and highly flammable, burning with a 'pop' sound when tested.
How is hydrogen gas tested in a laboratory?
By bringing a lit splint near the gas — hydrogen burns with a characteristic 'pop' sound
Why does hydrogen rise when released into air?
Because it's much lighter (less dense) than air
Hydrogen can be prepared by reacting a metal (like zinc) with a dilute acid. It's used as a fuel, in the manufacture of ammonia, and in hydrogenating oils.
How is hydrogen commonly prepared in a lab?
By reacting a metal like zinc with dilute hydrochloric or sulfuric acid
Name one industrial use of hydrogen.
Manufacturing ammonia (Haber process), or hydrogenating vegetable oils
1. What test confirms the presence of hydrogen gas?
2. Is hydrogen lighter or heavier than air?
3. How can hydrogen be prepared in a lab?
4. Name one use of hydrogen.
5. Is hydrogen flammable?