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IBChemistrySLExam QuestionsModels of Bonding & StructureFrom Models to Materials

Syllabus Edition

First teaching 2023

First exams 2025

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From Models to Materials (SL IB Chemistry)

Exam Questions

51 mins15 questions

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From Models to Materials

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11 mark

Which of the following statements about alloys are correct? 

  1.   Alloys contain atoms of all the same sizes
  2.   An alloy is a mixture of a metal with another element
  3.   Alloys are harder than the pure metal they originate from

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

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21 mark

A molecule of a polymer contained the sequence shown.

10-2-e-q5-ib-chemistry-mcqs


Which monomer could produce this polymer by addition polymerisation?

  • CHCl =CHCl

  • CH2=CHCl

  • CH3CCl =CHCl

  • CH3CCl =CH2

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31 mark

Which of the following chemicals is not correctly placed within this triangular bonding triangle?

bonding-model-triangle-e-mcq

  • Li2O

  • CH4

  • CBr4

  • Mg

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41 mark

Using a triangular bonding diagram, which of the following cannot be deduced about an unknown chemical?

  • The formula of the unknown chemical.

  • The physical properties of the unknown chemical.

  • The type of bonding present in the unknown chemical.

  • Whether the unknown chemical is an element or a compound.

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11 mark

Which type of bonding can be described as ‘the electrostatic attraction between positive nuclei and electrons and occurs by the sharing of electrons’? 

  • Hydrogen bonding

  • Ionic bonding 

  • Metallic bonding 

  • Covalent bonding 

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21 mark

A binary compound is plotted on a triangular bonding diagram. The electronegativity values for each element are 1.6 and 3.4.

Which estimate for the percentage ionic and percentage covalent character in the compound is correct?

  • 10% covalent, 90% ionic

  • 40% covalent, 60% ionic

  • 55% covalent, 45% ionic

  • 100% covalent, 0% ionic

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11 mark

The properties of alloys can be explained in terms of metals having

  1. Non-directional bonding
  2. Delocalised electrons
  3. Ions of different size

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

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21 mark

Using Sections 9 and 17 of the Data Booklet, which of the following predictions about gallium tribromide is/are not correct?

  1. It is a poor insulator.
  2. It has a high melting and boiling point.
  3. It is hard and brittle.

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

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