Hydrogen Flashcards
1
Q
What colour is hydrogen?
A
Hydrogen is a colourless gas.
2
Q
What does hydrogen gas smell like.
A
Hydrogen gas has no smell
3
Q
True or false?
Hydrogen dissolves in water.
A
False
4
Q
What is the chemical test for hydrogen.
A
To test for hydrogen, ignite a small sample, and listen for a pop.
5
Q
Is hydrogen more or less dense than air?
A
Hydrogen is less dense than air.
6
Q
What happens when hydrogen burns or explodes?
A
It combines with oxygen from the air to form water,
7
Q
What is the chemical name for water?
A
Hydrogen oxide.
8
Q
What is the word equation for the reaction hydrogen has to burning?
A
Hydrogen+oxygen —> water.
9
Q
What is the chemical formula for water?
A
H2O
10
Q
What is the colour of cobalt paper when it is dry and when it is wet?
A
Blue when dry and pink when wet.
