MCAT Organic Chemistry Question 178: Answer and Explanation

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Question: 178

13. The gas eluent in gas chromatography and the liquid eluent in paper chromatography are examples of which component of these systems?

  • A. Stationary phase
  • B. Mobile phase
  • C. Column
  • D. Fraction

Correct Answer: B

Explanation:

Each of these is the mobile phase of the system, in which the solutes are dissolved and move. The stationary phase in gas chromatography is usually a crushed metal or polymer; the stationary phase in paper chromatography is paper.

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