Coding for the type of compound

2 marks · Normal

State the number of carbon atoms in a molecule with the code letters 'prop' in its name and give the name of the corresponding alkane.

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3; propane

Also accept: 3 carbons; propane; Propane has 3 carbon atoms

Common mistakes: Giving ethane as answer; Giving 2 or 4

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Marking points

B1 · 1 mark · States that 'prop' means 3 carbon atoms

B2 · 1 mark · Gives the correct alkane name: propane

Worked solution

The code 'prop' means 3 carbon atoms in the chain. The corresponding alkane is propane.