EASY
Upper Secondary: IGCSE
IMPORTANT
Earn 100

In the separation of air into its gases why is argon obtained before oxygen?

Important Questions on Air and Water

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 1
In the separation of air into its gases, what do you think is the biggest expense? Explain.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 5
Give three uses for noble gases.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 1
Which come from petrol burned in car engines?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 1
Which come from air? How and why do these form?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 2
Natural gas or methane is a fossil fuel. In a plentiful supply of air, it burns to give carbon dioxide and water. Write a balanced equation to show this.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 3
If methane burns in a poor supply of air it will give carbon monoxide and water instead. See if you can write a balanced equation to show this.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 2
Which two substances cause iron to rust?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 15 - Air and Water>Q>Q 5
You have a new bike. Suggest steps you could take to make sure it does not rust. Give a reason for each one.