Choose a Separation Method from Properties - Practice 2

Choose from the stated properties of a mixture.

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Choose from the stated properties of a mixture. A filter can retain insoluble particles larger than its pores but does not ordinarily remove dissolved salt. These are paper questions; do not heat or handle unknown samples.

Worked example

A suitable filter can retain sand while liquid water passes. Dissolved salt remains with that water.

Would you believe it?

Not every metal is strongly attracted to an ordinary magnet. A shiny surface alone is not a reliable magnet test.

Question 1 In a diagram, a magnet attracts steel pins but not plastic beads. How could the mixture be separated? turn off all light use a magnet use a clock

Question 2 Dry grain sizes differ greatly in a diagram. What can separate larger from smaller grains? a suitable sieve a calendar a thermometer

Question 3 An insoluble solid is larger than the stated filter pores. What can retain it while water passes? a clock a mirror a suitable filter

Question 4 After water evaporates from salt solution in a paper model, what remains? only a magnet the dissolved salt as solid residue nothing because salt ceased to exist

Question 5 Large red and blue counters are mixed. What property supports sorting them? their visible colors their unknown temperature a claim that all are identical

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