MCAT Organic Chemistry Question 173: Answer and Explanation
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Question: 173
8. Silica gel is often used in thin-layer chromatography. What property does silica gel probably possess that makes it useful for this purpose?
- A. Acidity
- B. Polarity
- C. Specifically sized pores
- D. Aqueous solubility
Correct Answer: B
Explanation:
Silica gels are polar. Polarity is used to selectively attract specific solutes within a nonpolar solvent phase. Although silica gels have other properties, this is the most important to TLC.