Cambridge IGCSE Combined Science practice

Paper 3 structured question: Alkanes

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Paper

Marks

Topic

Alkanes

Exam-style question

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Paper 3Theory (Core)2 marks

Alkanes are a group of hydrocarbons that are known for their stability and low reactivity.

Description

Alkanes primarily undergo combustion reactions when they react with oxygen.

a
Explain why alkanes are mostly unreactive except during combustion.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)3 marks

Description

When alkanes combust, they produce carbon dioxide and water, releasing energy.

a
Describe the products of alkane combustion and their significance.
Your answer
Aim for approximately 3 distinct marking points.
[3]