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JEE Main · 2023 · 15 Apr 2023 · Shift 1 · Practical and Analytical Chemistry

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Which of the following statement is correct for paper chromatography?
  1. (A)Water present in the mobile phase gets absorbed by the paper which then forms the stationary phase.
  2. (B)Water present in the pores of the paper forms the stationary phase.✓ Correct
  3. (C)Paper sheet forms the stationary phase.
  4. (D)Paper and water present in its pores together form the stationary phase.

Answer: (B)

Solution

In paper chromatography, a special quality chromatography paper is used. The paper contains water trapped in its pores, and this water acts as the stationary phase. The mobile phase (solvent) moves through the paper, carrying the components of the mixture at different rates based on their partition between the mobile phase and the water in the pores (stationary phase).

JEE Main · 2023 · 15 Apr 2023 · Shift 1 · Single correct option

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