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

Practise IB Chemistry SL 1.1 with evidence-led questions on particles, elements, compounds, mixtures and kinetic molecular theory.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Classify elements, compounds and mixtures, then select physical separation methods from component properties.
  • Use particle models and state symbols to explain state changes and relate Kelvin temperature to particle kinetic energy.

Covered syllabus points

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

Learn this topic

Study 1.1 Introduction to the particulate nature of matter conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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]

Nitrogen dioxide, NO2\mathrm{NO}_{2}, is a brown, toxic and corrosive gas. It can be made in a school laboratory by heating a group II metal nitrate or by the reaction of copper, Cu , with concentrated nitric acid, HNO3\mathrm{HNO}_{3}.

The initial amount of NO2\mathrm{NO}_{2} was determined by titration. The oxide was first dissolved in water according to the following equation:

2NO2( g)+H2O(l)→HNO3(aq)+HNO2(aq)2 \mathrm{NO}_{2}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{HNO}_{3}(\mathrm{aq})+\mathrm{HNO}_{2}(\mathrm{aq})

The solution was made up to 250.0 cm3250.0 \mathrm{~cm}^{3} and 25.0 cm325.0 \mathrm{~cm}^{3} portions of this solution were then titrated against a 0.0500 moldm−30.0500 \mathrm{~mol} \mathrm{dm}^{-3} standard solution of sodium hydroxide, NaOH .

Calculate the values for temperature, T , in degrees kelvin, K , and complete the table.

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