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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Simple molecules and covalent bonds

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Simple molecules and covalent bonds

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Paper 4Theory (Extended)1 marks

Covalent bonding in simple molecules

Description

Covalent Bonds in Molecules

Consider the following molecules: CH₃OH, C₂H₄, O₂, CO₂, and N₂. Each of these molecules is formed by covalent bonds between non-metal atoms.

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    State the type of bond formed in these molecules.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Simple molecules and covalent bonds

Paper 4Theory (Extended)3 marks

Diagram Description

Dot-and-Cross Diagrams

Draw dot-and-cross diagrams for CH₃OH and CO₂, showing the shared pairs of electrons.

  1. a

    Describe the dot-and-cross diagram for CH₃OH.

    Aim for approximately 3 distinct marking points.

    [3]