Grade 10 Physical Sciences · Matter and Materials

Define bonding and intermolecular terms

Give the exact meaning of bonding words like covalent bond, ionic bond, lone pair, electronegativity and bond energy.

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

Grade 11 Chemistry Bond Energy & Strength, Bond Length and Bond OrderMiss Martins Maths and Science

Electronegativity Grade 11 Chemistry Polarity of BondsMiss Martins Maths and Science

Intermolecular vs Intramolecular forces Grade 11 ChemistryMiss Martins Maths and Science

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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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More past paper questions: define bonding and intermolecular terms

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3. 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
4. Question 3.1 · November 2023 · Paper 2 · National (DBE) · 2 marks
The relationship between boiling point and the molecular mass of aldehydes, carboxylic acids and primary alcohols is investigated. Curves P, R and S are obtained. All compounds used are straight chain molecules.

GRAPH OF BOILING POINT VERSUS MOLECULAR MASS
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
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

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