Hydrogen And Oxygen

Question 0

How can hydrogen and oxygen be produced?

Answer 0

From water by electrolysis and twice as much hydrogen and oxygen is produced

Question 1

What non-metals can be found in the air?

Answer 1

Nitrogen (78%) oxygen (21%) argon (less than 1%)

Question 2

What is the chemical test for hydrogen?

Answer 2

Collect the hydrogen gas and ignite it with a lighted splint. Hydrogen explodes with a ‘squeaky pop’

Question 3

What is the chemical test for oxygen?

Answer 3

Collect the oxygen gas and insert a glowing splint into a test tube. Oxygen will re-light the glowing splint

Question 4

What are the two most important gases we use?

Answer 4

Hydrogen and oxygen

Question 5

What are the uses of oxygen?

Answer 5

In medicine as an aid to breathing
Producing high temperatures
In liquid form to burn with rocket fuel

Question 6

What are the uses of hydrogen?

Answer 6

Making hydrocarbons
Making margarine
Fuel in hydrogen fuel cells

Question 7

What are the advantages and disadvantages of hydrogen?

Answer 7

Advantages-
High-energy yield
Non-polluting

Disadvantages-
Highly flammable
Needs to be stored in pressurised tanks
Few filling stations present