Coding for the type of compound

2 marks · Hard

State the code letter for a three-carbon chain in organic compounds. Give the name and the displayed formula for the simplest alkene containing three carbon atoms.

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Also accept: Code letter: prop; Name: propene; Displayed formula: CH2=CHCH3; Displayed formula may also be shown as CH2=CH–CH3

Common mistakes: Giving alkane instead of alkene; Wrong number of carbon atoms

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Marking points

B1 · 1 mark · States correct code letter for a three-carbon chain: prop

B2 · 1 mark · Gives name and displayed formula for three-carbon alkene: propene, CH2=CHCH3 (accept equivalent correct display)

Worked solution

The code letter for a three-carbon chain is 'prop'.

The simplest alkene with three carbon atoms is called propene.