Chapter 1: Planning, Variables and Risk

A-level ChemistryModule 1: Practical Skills6 topicsHigher

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alevel · chemistry · Module 1: Practical Skills · All papers

Releases 1 August 2026

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Planning, Variables and Risk: Long Answer Questions

Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.

4 questions15 marks38 min

standard / hard / synoptic

2 marksdefinestandardOCR A

Define or identify the key idea in core definition, then explain why it matters in Planning, Variables and Risk.

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3 marksexplainstandardOCR A

Proof Academy original experimental data

Condition	Measurement 1	Measurement 2	Mean
A	12.4	12.8	12.6
B	18.1	17.7	17.9
C	24.6	24.2	24.4

Using the stimulus where appropriate, explain the pattern or process involving calculation in Planning, Variables and Risk.

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4 marksanalysehardOCR A

Trend from an OCR-style practical

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Analyse how practical evidence affects the outcome in Planning, Variables and Risk. Include any relevant calculation, condition, diagram feature, or limitation.

State the relevant principle for practical evidence.
Apply it to the data, diagram, or named example.
Give a justified conclusion.

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6 marksevaluatesynopticOCR A

Original clean exam diagram

reagent Aintermediateproduct

Evaluate the chemical reasoning and practical evidence for synoptic link in Planning, Variables and Risk. Your answer should be coherent, use precise exam-board terminology, and consider both method and evidence.

State the relevant principle for synoptic link.
Apply it to the data, diagram, or named example.
Give a justified conclusion.

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Start of Module 1: Practical Skills

2. Implementing Methods and PAG Technique

Key learning objectives

Understand the key principles behind Planning, Variables and Risk.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.

Condition

Measurement 1

Measurement 2

Mean

12.4

12.8

12.6

18.1

17.7

17.9

24.6

24.2

24.4