Separation of Mixtures Quiz

The solid that remains in the filter paper after filtration is called the ___________. The liquid that passes through the filter paper is called the ________.

Explain the following regarding the apparatus setup for distillation. Addition of boiling chips. Thermometer is placed at the opening of condenser.

Name the method used to separate: substances in black ink: ___________________ gravels from river water: __________________ salt from sea water: ______________________ water from solution of yellow ink: ____________ pieces of iron from aluminium: _______________

Number the steps of separating a mixture of sand, salt and iron filings in a correct logical sequence. Description of step Number Add water to the mixture to dissolve salt Evaporate the salt solution to dryness to obtain pure salt Carry out filtration to obtain sand as residue Use a magnet to separate the iron filings from the mixture

Using the description of steps in Q5, describe fully how you would separate the potassium nitrate (water soluble compound with a very high melting point), nickel and plastic chips in a correct logical sequence.

A mixture of salt and chalk powder can be separated by the following several processes. The correct order of sequence is __________?

• filtration ( solution ( evaporation

• evaporation ( filtration ( solution

• solution ( filtration ( evaporation

• solution ( evaporation ( filtration

In obtaining sugar from sugar solution, crystallization is done instead of evaporation. This is because ____________.

• evaporation forms impure sugar

• sugar decomposes on heating

• sugar is a compound, not a mixture

• evaporation takes a longer time than crystallization

Paper chromatography is the method used to separate _________.

• two different liquids of different boiling points

• two different solids that are soluble in the same liquid

• two different substances that have different densities

• two different substances that have different magnetic properties

Fractional distillation may be used to separate crude oil into its constituents because its constituents _________.

• are insoluble in water

• have different boiling points

• have different densities

• are very reactive

Distillation is a physical process. It involves ___________?

• filtration and then evaporation

• filtration and then condensation

• solution and then evaporation

• evaporation and then condensation