ChemistryChapter 19: Chromatography
Limits
Chromatography checks dye purity and separates plant pigments.
Learning objectives
- Define and explain limits.
- Apply limits to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Definition
Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (a stain or UV lamp) or you will miss them. Overlapping spots are a limitation: two substances can sit on the same patch and look like one.
Important terms
- Limits
- Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (a stain or UV lamp) or you will miss them. Overlapping spots are a limitation: two substances can sit on the same patch and look like one.
Overview
Learn the idea, then use it:
Core Understanding
Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (a stain or UV lamp) or you will miss them. Overlapping spots are a limitation: two substances can sit on the same patch and look like one.
Examples dye purity · plant pigments · Colourless · visualisation
Exam Application
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Examples Define first · Show the rule or evidence · Check units, labels, and conclusion
WHAT — LIMITS
Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (a stain or UV lamp) or you will miss them. Overlapping spots are a limitation: two substances can sit on the same patch and look like one.
HOW — Use the idea
Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.
In simple words
Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
Key points
- dye purity
- plant pigments
- Colourless
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Limits
Sticky Notes · Quick Revision
Core Idea
- Chromatography checks dye purity and separates plant pigments.
Key Points
- dye purity
- plant pigments
- Colourless
Simple Check
- Explain limits in your own words and connect it to one chapter example.
How to Answer
- Define the idea, show the main rule or evidence, apply it, and check the final statement.
Common Mistake
- Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
FBISE Exam Tip
- Use the exact term, show working where needed, and include units or labelled evidence.
60-second revision
- Chromatography checks dye purity and separates plant pigments.
- dye purity
- plant pigments
- Colourless
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