Expt Chem 1.3/1.4 Separation and Purification

Which separation technique is most suitable for separating iron filings from sand?

• Filtration

• Magnetic attraction

• Crystallisation

• Sublimation

Chromatography can be used to separate components of a mixture based on their different solubilities in a given solvent.

• True

• False

The process of changing directly from solid to gas state is called

Which method is used to separate two immiscible liquids?

• Simple distillation

• Fractional distillation

• Separating funnel

• Evaporation

The Rf value in chromatography is calculated as:

• Distance travelled by solvent / Distance travelled by substance

• Total distance of paper / Distance travelled by substance

• Distance travelled by substance / Total distance of paper

• Distance travelled by substance / Distance travelled by solvent

A pure substance always has a fixed boiling point under standard conditions.

• True

• False

Fractional distillation is used to separate:

• Solids from liquids

• Immiscible liquids

• Miscible liquids with different boiling points

• Gases from liquids

The substance that remains on the filter paper after filtration is called the

The substance that is collected in the conical flask after filtration is called the

Which of the following is NOT a method for separating solid-solid mixtures?

• Magnetic attraction

• Sieving

• Simple distillation

• Sublimation