The photograph shows a Bunsen burner - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Question 5
The photograph shows a Bunsen burner.
The burner uses methane as a fuel.
(a) Methane is a hydrocarbon.
The formula of a molecule of methane is CH₄.
Explain what is... show full transcript
Worked Solution & Example Answer:The photograph shows a Bunsen burner - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Step 1
Explain what is meant by a hydrocarbon.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A hydrocarbon is a compound consisting solely of hydrogen and carbon atoms. In the case of methane (CH₄), it contains one carbon atom bonded to four hydrogen atoms, illustrating the basic building blocks of hydrocarbons.
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Methane is a useful fuel because, when it burns, it produces:
☑ A carbon dioxide
Step 3
Give the name of the process used to separate crude oil into fractions.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The process used to separate crude oil into fractions is called fractional distillation.
Step 4
Draw one straight line from each fraction to its correct use.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Lines should connect:
Petrol → fuel for cars
Kerosene → fuel for jet engines
Gases → gaseous fuel for home heating
Bitumen → surfacing roads
Step 5
Describe the problems that can be caused by these products of complete and incomplete combustion.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The products of complete combustion (carbon dioxide and water vapor) contribute to the greenhouse effect, leading to global warming and climate change. Incomplete combustion produces carbon monoxide, which is toxic and can lead to serious health risks such as carbon monoxide poisoning. Additionally, pollutants like soot can accumulate, causing respiratory issues and environmental degradation.
