Gas Chromatography
Gas chromatography separation depends mainly on differences in:
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More purification techniques Practice Questions
A pure organic solid typically shows a melting point that is:
A pure organic solid typically shows a melting point that is:
Azeotropic distillation uses an added component primarily to:
Azeotropic distillation uses an added component primarily to:
If a burette reading is consistently 0.10 mL higher due to parallax, the primary effect on calculate...
If a burette reading is consistently 0.10 mL higher due to parallax, the primary effect on calculate...
Fractional crystallization separates dissolved salts based on:
Fractional crystallization separates dissolved salts based on:
Fractional distillation is preferred over simple distillation when:
Fractional distillation is preferred over simple distillation when:
In thin-layer chromatography (TLC), the Rf value of a compound is defined as:
In thin-layer chromatography (TLC), the Rf value of a compound is defined as:
Which mixture can be separated by sublimation?
Which mixture can be separated by sublimation?
Best method to obtain pure crystals from an impure solid soluble in hot water and less soluble in co...
Best method to obtain pure crystals from an impure solid soluble in hot water and less soluble in co...
Steam distillation is suitable for substances that:
Steam distillation is suitable for substances that:
Differential extraction of organic compound from aqueous solution uses an organic solvent that is:
Differential extraction of organic compound from aqueous solution uses an organic solvent that is:
In Lassaigne's test, presence of nitrogen is confirmed by formation of a Prussian blue complex due t...
In Lassaigne's test, presence of nitrogen is confirmed by formation of a Prussian blue complex due t...
In Lassaigne's test, sulphur is detected by formation of:
In Lassaigne's test, sulphur is detected by formation of:
About This Question
- Subject
- chemistry
- Chapter
- purification techniques
- Topic
- gas chromatography
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Vapor pressure and interaction with stationary phase
- Principle: Separates volatile compounds in the gas phase.
- Mobile Phase: An inert carrier gas (e.g.,Helium).
- Stationary Phase: A high-boiling liquid or a solid absorbent coated on a column wall.
- Volatility: Compounds with higher vapor pressures (lower boiling points) spend more time in the gas phase and travel faster.
- Affinity: Separation also depends on the 'chemical like' interactions (VanderWaals, dipole-dipole) between the solute and the stationary phase.
- Separation: Together, these factors lead to different retention times for different molecules.
This medium difficulty chemistry question is from the chapter purification techniques, covering the topic of gas chromatography. It appeared in the 2025 exam.
Looking for more practice? Explore all chemistry questions or browse purification techniques questions on RankGuru.