Read before you solve · 2 min
Read Venn classification
This SOF ISO pattern tests classify changes. Read the condition carefully, then use the method below before you solve.
ISO · Physical and Chemical Changes · 1 linked question · 100% coverage
Know this first
Chemistry questions first require the material, particles or reaction condition to be identified before a formula or rule is selected.
Observation · What the stem states or showsCondition · The factor that controls the change
Study deeper: Class 8 Science · Physical and Chemical Changes
Find the tested idea
Turn the figure, table or rule into small labelled steps before looking at the options.
Work from the evidence
Choose two anchor features or one confirmed rule. Apply it consistently; an option with even one broken anchor is eliminated.
Verify before choosing
Use the wording, diagram and units exactly as given. Select an option only after it satisfies every stated condition.
OlympIQ exam lens
- ✓Mark the given information.
- ✓Apply one rule at a time.
- ✓Eliminate using an exact mismatch.
OlympIQ trap
Do not rotate, mirror or reverse a figure unless the stem specifically requires that transformation.
Ready to try the pattern?
100% coverage across the linked question.
Practise the linked questionSign in to practise — your XP, streak and analysis update as you solve.