S2.4 From models to materials - IB Questionbank | RevisionDojo

S2.1 The ionic model

S2.2 The covalent model

S2.3 The metallic model

S2.4 From models to materials

S2.4 From models to materials Questionbank

Practice S2.4 From models to materials with authentic IB Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.

Paper

Level

Question 1

SLPaper 2

The diagram below shows the boiling points of hydrogen chalcogenides ( $H_2O, H_2S, H_2Se, H_2Te$ ) plotted against the period number of the central atom.

State the trend in boiling point from $H_2S$ to $H_2Te$ .

[1]

Suggest why the boiling point of $H_2O$ is much higher than expected based on the trend for $H_2S, H_2Se$ , and $H_2Te$ .

[2]

Identify the main type of intermolecular force present in $H_2S, H_2Se$ , and $H_2Te$ .

[1]

Explain why the boiling points increase from $H_2S$ , to $H_2Te$ .

[2]

Question 2

SLPaper 2

The bonding triangle can be used to predict the properties of materials.

Place ${NaCl}$ , ${CH_4}$ , and ${Fe}$ on the bonding triangle.

[3]

Compare their electrical conductivities in the solid state.

[2]

Explain your answer from Part 2 based on bonding and structure.

[2]

Question 3

SLPaper 2

Polyethylene, one of the most widely produced plastics in the world, is formed by the addition polymerization of ethene. Its widespread use in packaging, containers, and consumer goods raises questions about sustainability and chemical efficiency.

Write a balanced chemical equation for the polymerization of ethene, showing the structure of the repeating unit.

[2]

Ethene has the molecular formula ${C_2H_4}$ . Using this, explain why the atom economy of its polymerization is 100%.

[2]

A chemist is designing a sustainability report comparing different polymers. State one environmental advantage and one disadvantage of polyethylene, with reference to its properties and use.

[2]

Suggest one way chemists are attempting to address the environmental impact of polyethylene, and explain how this helps.

[2]

Question 4

SLPaper 1A

Which substance dissolves in water to form a solution that does not conduct electricity?

Question 5

SL & HLPaper 1A

What is the primary reason why alloys are generally stronger than pure metals?

Question 6

SLPaper 1A

Which is the correct order based on increasing strength?

Question 7

HLPaper 1A

Which compound has the largest value of lattice enthalpy?

Question 8

SL & HLPaper 1A

Which of the following statements best describes why the alloy is stronger than the pure metal?

Question 9

HLPaper 1A

How many electrons form the carbon–oxygen bond in methanal, HCHO?

Question 10

SLPaper 1A

Which molecule is most polar?

Paper

Level

Question 1

SLPaper 2

The diagram below shows the boiling points of hydrogen chalcogenides ( $H_2O, H_2S, H_2Se, H_2Te$ ) plotted against the period number of the central atom.

State the trend in boiling point from $H_2S$ to $H_2Te$ .

[1]

Suggest why the boiling point of $H_2O$ is much higher than expected based on the trend for $H_2S, H_2Se$ , and $H_2Te$ .

[2]

Identify the main type of intermolecular force present in $H_2S, H_2Se$ , and $H_2Te$ .

[1]

Explain why the boiling points increase from $H_2S$ , to $H_2Te$ .

[2]

Question 2

SLPaper 2

The bonding triangle can be used to predict the properties of materials.

Place ${NaCl}$ , ${CH_4}$ , and ${Fe}$ on the bonding triangle.

[3]

Compare their electrical conductivities in the solid state.

[2]

Explain your answer from Part 2 based on bonding and structure.

[2]

Question 3

SLPaper 2

Write a balanced chemical equation for the polymerization of ethene, showing the structure of the repeating unit.

[2]

Ethene has the molecular formula ${C_2H_4}$ . Using this, explain why the atom economy of its polymerization is 100%.

[2]

A chemist is designing a sustainability report comparing different polymers. State one environmental advantage and one disadvantage of polyethylene, with reference to its properties and use.

[2]

Suggest one way chemists are attempting to address the environmental impact of polyethylene, and explain how this helps.

[2]

Question 4

SLPaper 1A

Which substance dissolves in water to form a solution that does not conduct electricity?

Question 5

SL & HLPaper 1A

What is the primary reason why alloys are generally stronger than pure metals?

Question 6

SLPaper 1A

Which is the correct order based on increasing strength?

Question 7

HLPaper 1A

Which compound has the largest value of lattice enthalpy?

Question 8

SL & HLPaper 1A

Which of the following statements best describes why the alloy is stronger than the pure metal?

Question 9

HLPaper 1A

How many electrons form the carbon–oxygen bond in methanal, HCHO?

Question 10

SLPaper 1A

Which molecule is most polar?