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SingaporeChemistryQuick questions
Organic Chemistry
Quick questions on Alkanes and fuels: N(A)-Level Chemistry
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the alkane family?Show answer
The alkanes are a family of hydrocarbons with similar properties. The first three are:
What is complete combustion?Show answer
When there is plenty of oxygen, an alkane undergoes complete combustion. It burns fully to give carbon dioxide and water, with a clean blue flame:
What is incomplete combustion?Show answer
When there is not enough oxygen, the alkane undergoes incomplete combustion. As well as water, it can produce carbon monoxide (a poisonous gas) and carbon (soot), and the flame is yellow and smoky. Carbon monoxide is dangerous because it stops the blood carrying oxygen, which is why gas heaters must have a good air supply.
What is q1?Show answer
State what is meant by a saturated hydrocarbon. [2 marks]
What is q2?Show answer
Write the word equation for the complete combustion of ethane. [1 mark]
What is q3?Show answer
Explain why a gas heater can produce carbon monoxide if it is used in a poorly ventilated room. [2 marks]
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