Grade 12 Physical Sciences · Matter and Materials

Write IUPAC names

Give the correct IUPAC name of an organic compound from its structure (CH₃CH₂OH is ethanol).

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Naming Alkanes Organic Chemistry Grade 12Kevinmathscience

Naming Organic Molecules Grade 12 | Alkenes, Alkynes, HaloalkanesKevinmathscience

Grade 12 Organic chemistry: Naming alkanes- Branched alkanes (IUPAC naming)Miss Martins Maths and Science

Grade 12 Organic Chemistry Naming alkanes EXAMPLES - LEVEL DIFFICULT | PART 1Miss Martins Maths and Science

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Question 2.2.1 · November 2025 · Paper 2 · National (DBE) · 3 marks

The letters A to G in the table below represent organic compounds. Diagram for this question

2.2 Write down the:

2.2.1 IUPAC name of compound A(3)

Work it out on paper first. Then mark yourself with the official memo, one tick at a time.

More past paper questions: write iupac names

Work each one out first, then open the memo and check every tick.

3. Question 3.3.2 · November 2025 · Paper 2 · National (DBE) · 2 marks
Two bottles contain compounds A and B with the same molecular formula, $C_{4} H_{8} O_{2}$ . These compounds are straight chain organic molecules that belong to two different homologous series, as shown below.

The boiling points are used to distinguish between the two compounds.
3.3 The following are the vapour pressures of these compounds at a given temperature:

Compound A: $0, 071$ kPa
Compound B: $9, 7$ kPa

Write down the:
3.3.2 IUPAC name for a possible compound B(2)
Show the memo (1 tick)Memo
1. ✓
  Name of an ester with formula C4H8O2Methyl propanoate / Propyl methanoate / Ethyl ethanoate
  2 marks · Write IUPAC names
4. Question 2.2.2 · November 2024 · Paper 2 · National (DBE) · 3 marks
The letters A to H in the table below represent organic compounds.
2.2 Write down the IUPAC name of compound:
2.2.2 E(3)
Show the memo (3 ticks)Memo
1. ✓
  Correct stem, i.e. pentyneLongest chain containing the triple bond: 5 C atoms: pentyne
  1 mark · Write IUPAC names
2. ✓
  Substituent (dimethyl) correctly identifiedSubstituents: two methyl groups (dimethyl)
  1 mark · Write IUPAC names
3. ✓
  IUPAC name completely correct4,4-dimethylpent-2-yne
  
  Accept: 4,4-dimethyl-2-pentyne
  1 mark · Write IUPAC names
5. Question 2.4.2 · May/June 2024 · Paper 2 · National (DBE) · 3 marks
The letters A to H in the table below represent eight organic compounds.
2.4 Write down the IUPAC name of compound:
2.4.2 G(3)
Show the memo (3 ticks)Memo
1. ✓
  Correct stemhexane (2,5-dichloro-2,4-dimethylhexane)
  1 mark · Write IUPAC names
2. ✓
  All substituentsdichloro and dimethyl
  1 mark · Write IUPAC names
3. ✓
  Name completely correct2,5-dichloro-2,4-dimethylhexane
  1 mark · Write IUPAC names
6. Question 4.6.3 · November 2024 · Paper 2 · National (DBE) · 2 marks
Study the flow diagram below.

Reaction I is a CRACKING REACTION forming two organic compounds, W and T, as the ONLY products.
4.6 Compounds R and T are positional isomers.

The inorganic reagents shown below are available for reactions IV and V.

$Br_{2}$ ; $H_{2} SO_{4}$ (conc.); NaOH(conc.); HBr; $H_{2}$

Write down:
4.6.3 The IUPAC name of compound T(2)
Show the memo (1 tick)Memo
1. ✓
  IUPAC name of TBut-2-ene / 2-butene
  
  (Accept: but-1-ene / 1-butene)
  2 marks · Write IUPAC names

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