Case study·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A teacher asks students to justify an answer from Carbon and Its Compounds, not only name the chapter term. The student's rough answer gives the final term but skips the observation.
Total: 4 marks
(a) State the observation or condition that must be used. (1 mark)
(b) Name the principle or process. (1 mark)
(c) Write the corrected conclusion. (2 marks)
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