Skip to content
QuizQuip
Sign up
Paper 4 styleExtended

Paper 4 style: theory (Extended)

Nine original structured questions in the style of the Extended theory paper — twenty marks of short answers in Section A and twenty marks of longer answers in Section B — with a full mark scheme.

Modelled on Cambridge IGCSE Chemistry Paper 4 (Theory, Extended). These are original QuizQuip questions written against the 0620 syllabus — not Cambridge past-paper questions.

Download paper (PDF)Mark schemePrint view
Total marks
40
Time
50 min
Format
5 MCQ + 4 structured
Covers
Questions drawn from across the 0620 syllabus, including the Supplement (Extended) statements

Set

The paper and mark scheme

Question paper

Paper 4 style practice paper

40 marks · 50 min · 7 pages

5 multiple-choice questions and structured questions with answer lines. Questions drawn from across the 0620 syllabus, including the Supplement (Extended) statements.

Download PDFPrint view

Mark scheme

PRO

Paper 4 style practice paper — mark scheme

Answers · Marking points · 4 pages

Model answers with a mark for each creditworthy point — for marking at home or in class.

Get mark scheme (Pro)Print view

Coverage

Topics in this paper

How to use

Work through it like the real exam

  1. 1Print the paper, or open the PDF and write your answers on paper.
  2. 2Set a timer and work without notes — the real thing is timed and closed-book.
  3. 3Mark your work with the mark scheme, one point at a time.
  4. 4Redo every question you lost marks on, then revise that topic.

Preview

The opening questions

Section A: Structured questions[20 marks]

Answer all questions in the spaces provided. The marks for each part are shown in brackets.

  1. 1

    An atom of an element contains 13 protons and 14 neutrons.

    1. (a)

      State the number of electrons in a neutral atom of this element.

      [1]
    2. (b)

      Calculate the mass number (nucleon number) of this atom.

      [1]
    3. (c)

      The element also has an isotope that contains 15 neutrons. Explain why the two atoms react in the same way.

      [1]
  2. 2

    Magnesium burns in oxygen: 2Mg + O₂ → 2MgO. A student burns 4.8 g of magnesium completely in oxygen. (Aᵣ: Mg = 24, O = 16)

    1. (a)

      Calculate the number of moles of magnesium burned.

      [1]
    2. (b)

      Use the equation to deduce the number of moles of magnesium oxide formed.

      [1]
    3. (c)

      Calculate the mass of magnesium oxide formed.

      [2]
    4. (d)

      State the volume of oxygen used in this reaction at room temperature and pressure. (1 mol of any gas occupies 24 dm³.)

      [1]
  3. 3

    Concentrated aqueous sodium chloride is electrolysed using inert electrodes.

    1. (a)

      Name the product formed at the cathode.

      [1]
    2. (b)

      Describe the test for this gas.

      [1]
    3. (c)

      Explain why sodium metal is not formed at the cathode.

      [2]
  4. 4

    A student stirs a white solid into water and finds that the temperature of the water falls.

    1. (a)

      State whether dissolving this solid is exothermic or endothermic.

      [1]
    2. (b)

      Explain your answer in terms of energy transfer.

      [2]
    3. (c)

      State one other change that is exothermic.

      [1]
Open the full paper

Revision

Before you sit the paper

  • Revise every topic this paper covers, using the free notes pages.
  • Do the quick quiz on each topic and note where you lose marks.
  • Practise the topical questions with the mark schemes.
  • Read the command words: state, describe, explain, calculate.

Tips

Exam tips

Marks come from key words

  • Give the number of marks’ worth of points the question asks for.
  • Name the substance, then explain — do not explain without naming.
  • In calculations, show the equation, substitute, then give the unit.
  • In Paper 6-style questions, write the observation, not the conclusion.

Questions

About the Paper 4 style

Is this a real Cambridge past paper?

No. Every question here is original QuizQuip material written in the style of Paper 4 so you can practise the wording, the marks and the timing. It is not a Cambridge past paper, and QuizQuip writes all of its own questions.

How should the 50 minutes be divided?

The real Extended theory paper gives 1 hour 15 minutes for 80 marks, which is about a minute per mark with reading time. This 40-mark set is timed at 50 minutes, so you get more time per mark than in the real paper. Aim for roughly 20 minutes on Section A and 25 on Section B, leaving a few minutes to check.

How is the mark scheme written?

Each part lists one line per credit, in the order a marker would read them, and the credits add up to the marks for that part. Where more than one wording is accepted, the answer notes the alternatives.

Does Section B use different skills from Section A?

Section A is short recall and calculation work. Section B asks for explanations, equations and practical reasoning, which is where most candidates lose marks through incomplete answers, so read the command word before you write.