Paper Chromatography

• What is the main technique discussed in the study material?

  Paper chromatography
• What is the purpose of the lid in paper chromatography?

  To prevent solvent evaporation
• Where should the pencil line be drawn in paper chromatography?

  Above the solvent level
• Why are Rf values solvent-dependent?

  Because they vary with different solvents
• How can you compare Rf values?

  Use the same solvent for comparison
• What can be run alongside the ink in chromatography?

  Pure dyes
• What is the term for the level reached by the solvent in chromatography?

  Solvent front
• How can a dye be identified in chromatography?

  By comparing Rf values to known compounds
• Why should the chromatography experiment be repeated?

  To check if spots match in different solvents
• What are the key steps in paper chromatography?

  1. Draw a pencil line above the solvent
  2. Apply a spot of ink on the line
  3. Place the paper in a solvent
  4. Allow the solvent to travel up the paper
  5. Observe the separation of dyes