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IB Chemistry HL 1.1 Introduction to the Particulate Nature of Matter Questions

Practise IB Chemistry HL 1.1 by classifying dispersed mixtures, choosing extraction or distillation, and using particle models to explain state changes and gas behaviour.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Classify elements, compounds and mixtures from bonding, fixed ratios and retained component properties.
  • Identify solution, emulsion and immiscible phases, then select distillation or solvent extraction for a mixture.
  • Use particle models to explain liquid flow, fixed volume, melting and the volume increase as propane vaporizes.
  • Identify deposition, sublimation or condensation from gas/solid state symbols in equations.
  • Interpret Kelvin–kinetic-energy graphs and compare gas-particle energies at equal temperatures.

Covered syllabus points

1.1.1—Elements, compounds, and mixtures1.1.2—Kinetic molecular theory1.1.3—Temperature and kinetic energy

Question 1

[Maximum number: 2]

Iron(II) sulfide can be produced by heating powdered iron and sulfur together.

Describe the difference between an element and a compound.

Question 2

[Maximum number: 2]

Alkanes are commonly occurring organic compounds.

The first four straight chain alkanes are gases at room temperature.

Boiling points of straight chain alkanes

Boiling points of straight chain alkanes

Explain why the volume occupied by a sample of propane increases sharply when the sample is heated up from 200 to 250 K at constant pressure.

Question 3

[Maximum number: 1]

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

Figure for Question 3 — IB Chemistry HL
A

X has the higher molar mass.

B

Y has the higher molar mass.

C

X has the higher average kinetic energy.

D

Y has the higher average kinetic energy.

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