Chromatography
In a TLC experiment, a compound spot moves 3.6 cm while the solvent front moves 6.4 cm from the baseline. The Rf value is:
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About This Question
- Subject
- chemistry
- Chapter
- purification and characterisation of organic compounds
- Topic
- chromatography
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
0.56
Rf is defined as distance travelled by solute divided by distance travelled by solvent front. Here, Rf = 3.6/6.4 = 0.5625, which is reported as 0.56. Since Rf must be less than 1 for a valid run, 0.56 is physically reasonable.
This easy difficulty chemistry question is from the chapter purification and characterisation of organic compounds, covering the topic of chromatography. It appeared in the 2025 exam.
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