Chemistry
Purification and characterisation for JEE — lab logic on paper
How JEE tests separation ideas and basic tests for both Main and Advanced without a real lab.
On JEE Main
Main tests crystallisation, distillation, chromatography principles, and qualitative element detection (Lassaigne test) in single-correct MCQ format. Each method separates based on a physical property — polarity, volatility, or affinity.
On JEE Advanced
Advanced occasionally uses paragraph formats linking a separation technique to its physical chemistry rationale, or matching functional group tests to observations. Multi-correct options exploit colour misconceptions in flame tests and precipitate colours.
How to practise
Use PracticeJEE's Purification and Characterisation topic for quick factual-plus-reasoning sets.
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