Rf Value
In thin layer chromatography (TLC), Rf value is calculated as:
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About This Question
- Subject
- chemistry
- Chapter
- purification and characterisation of organic compounds
- Topic
- rf value
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Distance moved by compound / Distance moved by solvent
The Retardation Factor (Rf) is a ratio used to identify substances in chromatography (TLC or Paper).
- Calculation: Rf=Distance traveled by the solvent front from the base lineDistance traveled by the substance from the base line
- Properties:
- The Rf value is always between 0 and 1.
- It is a characteristic constant for a particular compound in a specific solvent system and stationary phase, enabling qualitative identification.
This easy difficulty chemistry question is from the chapter purification and characterisation of organic compounds, covering the topic of rf value. It appeared in the 2025 exam.
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