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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.
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Limits
What is it?
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.
In simple words
- Chromatography checks dye purity and separates plant pigments.
- dye purity
- plant pigments
- Colourless
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.
What you should learn
- Define and explain limits.
- Apply limits to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Examples
- dye purity
- plant pigments
- Colourless
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.
EXAM APPLICATION
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Recommended for Class 9
Full school-level explanation
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.
Learn the idea, then use it:
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.
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.
Remember
- dye purity
- plant pigments
- Colourless
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.
Remember
- correct term
- chapter link
- clear application
Examples
- Define first
- Show the rule or evidence
- Check units, labels, and conclusion
Remember
- dye purity
- plant pigments
- Colourless
- keep the ideas separate
- dye purity
- plant pigments
- Colourless
- correct term
Deeper understanding
Go beyond memorising Limits. Connect the definition to reasons, relationships, exceptions, and exam wording.
Common mistakes
Exam focus
Core Idea
Key Points
Simple Check
How to Answer
Exam focus
Quick revision
- dye purity
- plant pigments
- Colourless
- keep the ideas separate
- Limits: Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (
- WHAT — LIMITS: Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (
Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
For long answers on Limits: define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- dye purity
- plant pigments
- Colourless
- keep the ideas separate
Important formulas
- dye purity
- plant pigments
- Colourless
Common exam traps
- Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
- Do not invent a formula, fact, unit, or diagram label that the chapter does not support.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
- Mistake
Do not invent a formula, fact, unit, or diagram label that the chapter does not support.
- Mistake
Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
dye purity
plant pigments
Colourless
keep the ideas separate
Chromatography checks dye purity and separates plant pigments. Colourless spots need visualisation (a stain or UV lamp) or you will miss them. Overlapping spots
- 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
- Example
- dye purity
- Critical warning
- Do not merge limits with a neighbouring idea that uses a different definition, rule, or method.
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Exam Practice
Define
Q1. Define Limits.
Explain
Q2. Explain: CORE UNDERSTANDING.
Example
Q3. Give one clear example of Limits and say why it fits.
Mistake
Q4. State one common mistake students make about Limits.
Exam note
Q5. Write a short exam note on Limits: definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.