Chromatography
In column chromatography, the stationary phase 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:
Silica gel or alumina
Column Chromatography is based on the principle of differential adsorption.
- Stationary Phase: A porous material with a large surface area, known as an Adsorbent, is packed into a vertical column. Common materials include Silica gel (SiO2) and Alumina (Al2O3).
- Mobile Phase: An appropriate solvent (or mixture) flows down through the adsorbent.
- Separation: Different components of the mixture adsorb onto the stationary phase with varying strengths. The less strongly adsorbed components move faster and are eluted first.
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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