Introduction to separation, extraction and chromatography

What is extraction?

• The action of removing, pulling something out of something

• A technique to separate certain components by passing it through a solution or medium

• A process of extracting a compound from a solid into a liquid

• An extraction process by which a compound is extracted from a solution into another solution

Which type of extraction uses a solvent with high solubility and strong polarity?

• Solid-liquid extraction

• Liquid-liquid extraction

• Gas extraction

• Thin-layer extraction

What is the purpose of a Soxhlet extractor in solid-liquid extraction?

• To isolate constituents from natural products

• To separate pigments from a flower

• To extract compounds from a solution into another solution

• To separate sugar from vegetable oil

Which solvent is commonly used in liquid-liquid extraction?

• Water

• Dichloromethane

• Ethanol

• Sodium hydroxide

What is the purpose of shaking the mixture with water in liquid-liquid extraction?

• To separate sugar from vegetable oil

• To extract compounds from a solution into another solution

• To separate pigments from a flower

• To increase the contact area between the two phases

What is the main principle of chromatography?

• To separate certain components by passing it through a solution or medium

• To remove, pull something out of something

• To extract a compound from a solid into a liquid

• To separate different compounds from a mixture based on their solubility

Who discovered chromatography?

• Mikhail Tsvet

• Auf Ali

• Mendeleev

• Louis Pasteur

What is the purpose of the stationary phase in chromatography?

• To separate different compounds from a mixture

• To connect with compounds of the same polarity

• To move the compounds at different rates

• To increase the contact area between the two phases

What is the purpose of the Rf value in thin-layer chromatography?

• To determine the retention time of a compound

• To calculate the peak area of a compound

• To measure the distance traveled by the solvent

• To compare the separation of compounds

What is extraction?

• The action of removing, pulling something out of something

• A technique to separate certain components by passing it through a solution or medium

• A process of extracting a compound from a solid into a liquid

• An extraction process by which a compound is extracted from a solution into another solution