Chromatography Quiz

What is the primary purpose of chromatography?

• To mix chemicals

• To separate and identify components of a mixture

• To heat substances

• To measure temperature

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

• Liquid

• Powder

• Solid

• Gel

In gas chromatography, what is the mobile phase typically?

• Solid

• Supercritical fluid

• Gas

• Liquid

What does the retention time in chromatography indicate?

• The temperature of the sample

• The time for the sample to travel through the column

• The pressure in the column

• The volume of the sample

Which chromatography method is used for ionic compounds?

• Adsorption

• Ion exchange

• Partition

• Size exclusion

What is the stationary phase in adsorption chromatography?

• Liquid

• Gas

• Solid

• Supercritical fluid

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

• The separation of two species

• The speed of the mobile phase

• The pressure of the mobile phase

• The temperature of the column

Which type of chromatography uses a porous matrix for separation?

• Adsorption

• Ion exchange

• Size exclusion

• Partition

What is the effect of increasing the mobile phase flow rate on column efficiency?

• It decreases efficiency

• It has no effect

• It increases efficiency

• It causes clogging

In partition chromatography, what is the basis for separation?

• Size of the molecules

• Charge of the molecules

• Relative solubility in mobile and stationary phases

• Temperature of the phases