Analytical Laboratory Techniques Quiz

What is the main principle behind chromatography?

• Mixing a mixture with a solid phase and filtering out components

• Freezing a mixture to separate components based on freezing points

• Heating a mixture to separate components based on boiling points

• Dissolving a mixture in a mobile phase and separating components based on different speeds of travel

Which type of chromatography uses a solid stationary phase and a liquid mobile phase?

• Liquid chromatography

• Gas chromatography

• Thin-layer chromatography

• Ion exchange chromatography

What is the mobile phase typically used in ion exchange chromatography?

• Oil

• Gas

• Aqueous buffer solution

• Organic solvent

How are ions separated in ion exchange chromatography?

• Based on their shape

• Based on their size

• Based on their charge

• Based on their color

What is the main purpose of size exclusion chromatography?

• Separating components based on shape

• Separating components based on charge

• Separating components based on color

• Separating components based on size or molecular weight

Which type of chromatography allows compounds to be separated by differences in size or molecular weight?

• Thin-layer chromatography

• Gas chromatography

• Ion exchange chromatography

• Size exclusion chromatography

What is the stationary phase in size exclusion chromatography made of?

• Porous beads or gel matrix

• Metal or glass separation column

• Silica material

• Resin or gel-like material

What is the main advantage of thin-layer chromatography?

• Large sample capacity

• High resolution separation

• Fast separation process

• Easy digitization of output

Which gas is commonly used in gas chromatography as the carrier gas?

• Carbon dioxide

• Nitrogen

• Argon

• Oxygen

What is the main factor that determines the speed of travel in gas chromatography?

• Temperature

• Pressure

• Type of mobile phase

• Type of stationary phase