Mixtures & Their Separation

Crude oil can be best separated using

• simple distillation

• filtration

• use of a separatory funnel

• fractional distillation

Which of the following is the best method to separate gravel stones from salt water

• crystallisation

• filtration

• evaporation

• use of a magnet

A mixture contains table salt, sand and water. What are the best methods to collect all components in the mixture?

• filtration and simple distillation

• evaporation and simple distillation

• filtration and use of a magnet

• use of a sieve and simple distillation

Water and chloroform are two liquids that are immiscible. The density of chloroform is 1.49gcm⁻³ and the density of water is 1.00gcm⁻³. These two liquids are placed in a separating funnel. The bottom layer thus formed is the water layer.

• True

• False

The liquid that collects at the end of a simple distillation experiment is the:

• filtrate

• distillate

• residue

• solvent front

Drinking water can be obtained from seawater by simple distillation.

• True

• False

The distillation of miscible liquids is only possible if the liquids have different boiling points.

• True

• False

Paper chromatography is a physical method for separating mixtures

• True

• False

The residue normally collects in the collecting vessel (the beaker below the filter funnel) during filtration.

• True

• False

A mixture of sand and salt can be separated on the basis of a difference in:

• boiling point

• melting point

• solubility

• particle size