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2012

Cambridge IGCSE · 0620 · Paper 3 · Theory (Extended)

Chemistry 0620/31 Oct/Nov 2012 past paper

Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 1, Oct/Nov 2012: the question paper and its official mark scheme, 7 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.

Questions
7
Marks
80
Grade A from
41
Open the question paperMark scheme

File names: 0620_w12_qp_31 · 0620_w12_ms_31

Grade thresholds for 0620/31 Oct/Nov 2012

The minimum raw marks Cambridge set for each grade on this component (out of 80). Thresholds change every session and variant, so always compare your score with the paper you actually sat.

ABCDE
41023016

Topics in this paper

Which syllabus chapters 0620/31 Oct/Nov 2012 tested, by marks. Each chapter links to every past-paper question on it.

ChapterQuestionsMarks
Atoms, elements and compounds224
Chemistry of the environment117
Stoichiometry115
Organic chemistry110
Acids, bases and salts18
Experimental techniques and chemical analysis16

Questions in 0620/31 Oct/Nov 2012

  1. Question 1Experimental techniques and chemical analysis · 6 marks

    For Examiner’s Use 1 A list of techniques used to separate mixtures is given below. fi ltration diffusion fractional distillation simple distillation crystallisation chromatography From this list, choose the most suitable technique to separate the following mixtures. A technique may …

  2. Question 2Atoms, elements and compounds · 11 marks

    For Examiner’s Use 2 Three of the halogens in Group VII are listed below. chlorine bromine iodine (a) (i) How does their colour change down the Group? (ii) How do their melting points and boiling points change down the Group? …

  3. Question 3Chemistry of the environment · 17 marks

    For Examiner’s Use 3 The speed (rate) of a chemical reaction depends on a number of factors which include temperature and the presence of a catalyst. (a) Reaction speed increases as the temperature increases. (i) Explain why reaction speed increases …

  4. Question 4Acids, bases and salts · 8 marks

    For Examiner’s Use 4 Silicon(IV) oxide, SiO2, and zirconium(IV) oxide, ZrO2, are both macromolecules. They have similar physical properties but silicon(IV) oxide is acidic and zirconium(IV) oxide is amphoteric. (a) Defi ne the term macromolecule. (b) (i) Predict three physical …

  5. Question 5Atoms, elements and compounds · 13 marks

    For Examiner’s Use 5 Carbonyl chloride, COCl 2, is widely used in industry to make polymers, dyes and pharmaceuticals. (a) Carbonyl chloride was fi rst made in 1812 by exposing a mixture of carbon monoxide and chlorine to bright sunlight. …

  6. Question 6Organic chemistry · 10 marks

    For Examiner’s Use 6 A sandwich contains three of the main constituents of food. bread contains complex carbohydrates butter contains fat meat contains protein (a) (i) These constituents of food can be hydrolysed by boiling with acid or alkali. Complete …

  7. Question 7Stoichiometry · 15 marks

    For Examiner’s Use 7 Both strontium and sulfur have chlorides of the type XCl 2. The table below compares some of their properties. strontium chloride sulfur chloride appearance white crystals red liquid formula SrCl 2 SCl 2 melting point …

Other Chemistry papers from Oct/Nov 2012

Questions students ask

Where can I get the 0620/31 Oct/Nov 2012 mark scheme?
Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w12_ms_31), and on a wide screen it sits beside the question you are reading.
What was the grade threshold for an A in 0620/31 Oct/Nov 2012?
41 marks out of 80, a C needed 23.
Which topics came up in 0620/31 Oct/Nov 2012?
Mostly Atoms, elements and compounds, Chemistry of the environment, Stoichiometry. The full list is in the table above.
Do I need an account to open 0620/31 Oct/Nov 2012?
No. Every paper opens for free without signing in. A free account also saves your pen marks and records your score against the grade thresholds.