Crude oil is a mixture of hydrocarbons.
.1
Define the term hydrocarbon.
[1 mark].2
Butane has 4 carbon atoms. Write the formula of butane.
[1 mark].3
Which fraction is used as fuel for aircraft?
[1 mark]Edexcel GCSE Chemistry June 2024 Paper 2F
5 questions on this paper's topics
16:001 of 5
Dry air is a mixture of gases.
.1
Which gas makes up about four-fifths of the air?
[1 mark].2
A classroom holds 200 m³ of air. Calculate the approximate volume of oxygen in the room, using oxygen as one-fifth of the air.
[1 mark]Acids react with metals, bases and carbonates to make salts.
.1
Name the salt made when magnesium oxide reacts with hydrochloric acid.
[1 mark].2
Name the salt made when sodium hydroxide reacts with sulfuric acid.
[1 mark].3
Name the gas produced when calcium carbonate reacts with hydrochloric acid.
[1 mark]A student adds marble chips to hydrochloric acid and collects the carbon dioxide in a gas syringe.
| Time in s | 0 | 10 | 20 | 30 | 40 | 50 | 60 |
|---|---|---|---|---|---|---|---|
| Volume in cm³ | 0 | 22 | 38 | 50 | 56 | 60 | 60 |
.1
Calculate the mean rate of reaction in the first 30 seconds.
[2 marks].2
Give the earliest time in the table by which the reaction had stopped.
[1 mark].3
Describe how the rate changes during the reaction.
[1 mark]Chemical reactions can transfer energy to or from the surroundings.
.1
Which two reactions are exothermic? Tick two boxes.
[2 marks].2
Give one everyday use of an endothermic reaction.
[1 mark]