Edexcel IGCSE Chemistry 4.5 structural and displayed formulae

Practise displayed-formula questions by drawing isomers, showing every bond and checking the formula matches the molecule.

Exam points

Draw displayed formulae for all isomers of C4H10, C5H12 or halogenated formulae.
Show every atom and bond in displayed formulae, not just a molecular formula.
Choose a valid structural formula for a given molecular formula from answer options.

[Maximum number: 1]

An organic compound has this percentage composition by mass.

\mathrm{C}=40 \% \quad \mathrm{H}=6.7 \% \quad \mathrm{O}=53.3 \%

Draw the structural formula of a compound with the molecular formula $\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}_{2}$

$\ce{CH3COOH}$

Or:
- $\ce{HCOOCH3}$

Accept:
- alternative methods

Marking guidance:
- Use the verified answer images for displayed structural formulae.

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4.5 Structures from molecular formulae question 1