Grade 11 Physical Sciences · Matter and Materials · Paper 2 (Chemistry)

Molecular Structure Grade 11

Real Molecular Structure past paper questions and answers from 2022 to 2026, with each memo split into the ticks examiners give. Try one, mark yourself, and see exactly which skill cost you marks.

past paper questions: 147 past paper questions
skills: 6 skills
videos: 6 videos

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Question 3.1 · November 2024 · Paper 2 · National (DBE) · 2 marks

The vapour pressures of different organic compounds are determined at

20

°C. The vapour pressures of compounds A, B and C are NOT shown in the table. Diagram for this question

3.1 Define the term vapour pressure.(2)

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Molecular Structure skills

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More Molecular Structure Grade 11 questions and answers

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4. Question 3.1 · May/June 2023 · Paper 2 · National (DBE) · 2 marks
Learners investigate the boiling points of the four organic compounds given below.
3.1 Define the term boiling point.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of boiling pointThe temperature at which the vapour pressure (of a compound) equals atmospheric pressure.
  2 marks · Define bonding and intermolecular terms
5. Question 3.2.1 · November 2022 · Paper 2 · National (DBE) · 2 marks
3.2 The table below shows the results obtained from an experiment to determine the vapour pressure of different STRAIGHT CHAIN primary alcohols at $300$ K.
3.2.1 Define the term vapour pressure.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of vapour pressureThe pressure exerted by a vapour at equilibrium with its liquid in a closed system.
  2 marks · Define bonding and intermolecular terms
6. Question 3.1 · May/June 2022 · Paper 2 · National (DBE) · 2 marks
Learners investigate factors that influence the boiling points of organic compounds. The boiling points of some organic compounds obtained are shown in the table below.
3.1 Define the term boiling point.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of boiling pointThe temperature at which the vapour pressure of a substance equals atmospheric/external pressure.
  2 marks · Define bonding and intermolecular terms
7. Question 3.1 · September 2026 · Paper 2 · Provincial · 2 marks
Three compounds are used to investigate one of the factors that affect the boiling point of organic compounds.

The table below shows the results obtained.
3.1 Define the term boiling point.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of boiling pointThe temperature at which the vapour pressure of a substance equals the atmospheric pressure.
  2 marks · Define bonding and intermolecular terms
8. Question 3.1 · September 2026 · Paper 2 · Provincial · 2 marks
The boiling points of organic compounds at a specific pressure are compared.
3.1 Define the term vapour pressure.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of vapour pressureThe pressure exerted by vapour at equilibrium with its liquid in a closed system.
  2 marks · Define bonding and intermolecular terms
9. Question 3.1 · September 2026 · Paper 2 · Provincial · 2 marks
The physical properties of four organic compounds shown in the table below are compared.
3.1 Define the term *boiling point*.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of boiling pointThe temperature at which the vapour pressure of a substance equals atmospheric pressure.
  2 marks · Define bonding and intermolecular terms
10. Question 3.1.1 · September 2026 · Paper 2 · Provincial · 2 marks
3.1 Learners use pent-2-ene and 2-methylbut-2-ene to investigate the factors that influence the boiling points of organic compounds.

The results are shown in the table below:

Answer the questions that follow.
3.1.1 Define the term boiling point.(2)
Show the memo (1 tick)Memo
1. ✓
  Definition of boiling pointThe temperature at which the vapour pressure (of a compound) equals atmospheric pressure.
  2 marks · Define bonding and intermolecular terms

Molecular Structure Grade 11 videos

Short lessons from South African teachers first. Videos load only when you tap play, to save your data.

Grade 11 Chemistry: Chemical bonding Atomic CombinationsMiss Martins Maths and Science

23) Lewis Diagrams Grade 10Kevinmathscience

21) Chemical bonding grade 10Kevinmathscience

Grade 11 Chemistry: Bond energy and length: Potential Energy GraphMiss Martins Maths and Science

Molecular shapes VSEPR Theory Grade 11 ChemistryMiss Martins Maths and Science

Atomic Combinations grade 11: Polar vs Non polarKevinmathscience

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