Hydrogen

Question 1

Properties of Hydrogen

Answer 1

Gas
Colourless
odouless
Fukin flammable 4% to 74%
Asphyxiant
much lighter than air

Question 2

Hazards of Hydrogen

Answer 2

very flammable Static can ignite it
asphyxiant
compressed gas

Question 3

firefighter action

Answer 3

BA PPE
cool cylinders
stop leak before extinguishing
spray
evac or stay indoors

Question 4

reactions with hydrogen

Answer 4

alkali metals and water release hydrogen
no reaction to water is soluble
react with oxygen to flammability and explosive
Hydrogen gas forms explosive mixtures with air if it is 4–74% concentrated and with chlorine if it is 5–95% concentrated. The mixtures may be ignited by spark, heat or sunlight