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Q: Which is the most common mobile phase for gas chromatography?
  • A. Oxygen
  • B. Carbon dioxide
  • C. Eltane
  • D. Argon
Correct Answer: Option D - The most common mobile phase is usually an inert gas or an unreacrtive gas such as helium, argon, nitrogen or hydrogen. The stationary phase is a microscopic layer of viscous liquid one surface of solid particles on an inert solid support inside a piece of glass or metal tubing called a column.
D. The most common mobile phase is usually an inert gas or an unreacrtive gas such as helium, argon, nitrogen or hydrogen. The stationary phase is a microscopic layer of viscous liquid one surface of solid particles on an inert solid support inside a piece of glass or metal tubing called a column.

Explanations:

The most common mobile phase is usually an inert gas or an unreacrtive gas such as helium, argon, nitrogen or hydrogen. The stationary phase is a microscopic layer of viscous liquid one surface of solid particles on an inert solid support inside a piece of glass or metal tubing called a column.