Cambridge IGCSE Combined Science practice

Paper 3 structured question: Simple molecules and covalent bonds

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Paper

Marks

Topic

Simple molecules and covalent bonds

Exam-style question

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Paper 3Theory (Core)3 marks

Consider the electrical conductivity of simple molecular compounds.

Description

Simple molecular compounds do not conduct electricity in any state.

a
Discuss the reasons why simple molecular compounds do not conduct electricity.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)2 marks

Description

Simple molecular compounds have low melting and boiling points and do not conduct electricity.

a
Explain why simple molecular compounds have low melting and boiling points.
Your answer
Aim for approximately 2 distinct marking points.
[2]