Chromatography Quiz

What is the primary purpose of chromatography?

• To heat substances

• To separate and identify components of a mixture

• To mix chemicals

• To measure temperature

Which of the following is a type of mobile phase in chromatography?

• Gel

• Liquid

• Solid

• Powder

In gas chromatography, what is the mobile phase typically?

• Liquid

• Gas

• Solid

• Supercritical fluid

What does the retention time in chromatography indicate?

• The pressure in the column

• The time for the sample to travel through the column

• The volume of the sample

• The temperature of the sample

Which chromatography method is used for ionic compounds?

• Partition

• Adsorption

• Size exclusion

• Ion exchange

What is the stationary phase in adsorption chromatography?

• Solid

• Supercritical fluid

• Gas

• Liquid

What does the selectivity factor (α) indicate in chromatography?

• The pressure of the mobile phase

• The ratio of capacity factors of two peaks

• The speed of the mobile phase

• The temperature of the column

Which of the following is NOT a type of chromatography based on physical means?

• Thin-layer chromatography

• Gas chromatography

• Planar chromatography

• Column chromatography

What is the purpose of the dead time (tM) in chromatography?

• To determine the volume of the sample

• To calculate the pressure

• To indicate the time for a non-retained compound to pass

• To measure the temperature

In size exclusion chromatography, what determines the separation of molecules?

• Their charge

• Their size

• Their solubility

• Their volatility