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A-Level Chemistry Past Papers & Drilling (Paper 1): Moles, Oxidation States, Isomerism
TUTORZONE ORIGINAL DRILLING MOCK · CAMBRIDGE A-LEVEL CHEMISTRY (9701) PAPER 1
Written to the Cambridge 9701 syllabus: Paper 1 Multiple Choice, 40 marks, 1 h 15 min, 15.5% of A Level (40 four-choice items, AS content); plus Paper 2 AS structured, Paper 4 A Level structured (100) and Paper 5 planning. This is a Paper 1 drilling mock: 6 questions demonstrating the 40-mark core concepts, with answers and techniques.
What is in A-Level Chemistry (9701) Paper 1?
Direct answer: Paper 1 Multiple Choice, 40 marks, 1 h 15 min, 15.5% of A Level (40 four-choice items, AS content).
Assessment at a glance (2027)
| Component | Content | Weighting | Duration |
|---|---|---|---|
| Paper 1 (Multiple Choice) | 40 four-choice items, 40 marks | 15.5% A-Level | 1 h 15 min |
| Paper 4 (A Level Structured Questions) | Structured questions, 100 marks | A Level 38.5% | 2 hours |
A-Level Chemistry Paper 1 drilling technique: 40 questions in 1 h 15 min is about 2 min each. Tools: sum Mr, n = m / Mr, oxidation states sum to the ion charge; isomers split into structural (different connectivity) and stereo (different arrangement).
How this paper was built
This is a TutorZone original drilling mock: the questions follow the Cambridge 9701 structure (Paper 1, 40 marks, 15.5%) and the answers are our own, not Cambridge past papers or marking references.
Every numeric answer was recomputed programmatically.
Pacing
| Section | Marks | Suggested time | What to do first |
|---|---|---|---|
| Paper 1 (Multiple Choice) | 15.5% A-Level | about 2 min per question | all AS content |
| Paper 4 (A Level Structured Questions) | A Level 38.5% | about 12 min per question | AS + A2 content |
What is the oxidation state of Mn in MnO4-?
Direct answer: +7 (x + 4x(-2) = -1).
Paper 1: concept drilling (6 demonstrated)
Check oxidation states against the ion charge; keep the two isomer types apart.
Question 1 (7 marks)
Calculate the relative molecular mass of HNO3 (H = 1, N = 14, O = 16).
Question 2 (7 marks)
How many moles are in 63 g of HNO3 (Mr = 63)?
Question 3 (7 marks)
Find the oxidation state of manganese in MnO4-.
Question 4 (6 marks)
Explain the meaning of electronegativity.
Question 5 (7 marks)
Explain the difference between structural and stereoisomerism.
Question 6 (6 marks)
Explain how Le Chatelier’s principle applies to equilibrium shifts.
Structural vs stereoisomerism?
Direct answer: structural isomers differ in how atoms are connected; stereoisomers have the same connectivity but differ in spatial arrangement.
Paper 1 answers
Question 1
Mr = 1 + 14 + 16×3 = 63 (7).
Question 2
n = m / Mr = 63 / 63 = 1 mol (7).
Question 3
Let Mn be x: x + 4x(-2) = -1, so x = +7 (7).
Question 4
Electronegativity is an atom’s power to attract the bonding pair in a covalent bond (6).
Question 5
Structural isomers differ in how atoms are connected (3.5); stereoisomers have the same connectivity but differ in spatial arrangement (E/Z, optical) (3.5).
Question 6
A system shifts to oppose the change imposed (e.g. raising pressure favours the side with fewer gas moles) (6).
Which topics does this paper drill?
Direct answer: relative molecular mass, mole calculations, oxidation states, electronegativity, isomerism and Le Chatelier’s principle.
Where these marks are usually lost
| Mistake | What it looks like | What it costs | Instead |
|---|---|---|---|
| Oxidation state without charge | Mn as +8 | Mn + 4x(-2) = -1 -> +7 | +7 |
| Isomer types mixed | Structural = spatial | structural=connectivity, stereo=space | connectivity vs space |
| Mr not multiplied | HNO3 as 47 | three oxygens | 63 |
How to use this paper
First drill: the full 1 h 15 min at the 40-question pace (this mock demonstrates 6 core items).
Mark it: check oxidation states and isomer classification.
Second drill: redo three to seven days later, aiming to finish inside 1 hour.
What should I do after drilling this paper?
Direct answer: log oxidation-state or isomer classification errors; redo in three to seven days; and drill Paper 4 structured questions.
FAQ
Is this a Cambridge past paper?
No. The questions and answers are TutorZone originals, not Cambridge past papers or marking references.
What is in A-Level Chemistry 9701 Paper 1?
Multiple choice, 40 marks, 1 h 15 min, 40 four-choice items covering AS content.
What is the oxidation state of Mn in MnO4-?
+7 (x + 4x(-2) = -1).
Official references
| Resource | What to check |
|---|---|
| Cambridge A-Level Chemistry 9701 page | Confirm the Paper 1-5 marks and times |
| https://www.tutorzone.com.hk/en-alevel-chemistry-9701-paper-2-mock-2027/ | A-Level Chemistry Paper 2 drilling mock |
Related: practice area · A-Level Chemistry Paper 2 drilling mock
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