Mixtures 01

1. Which of these substances is a mixture?

   • Oxygen
   • Salt
   • Sea water
   • Water

2. The best description of a mixture is .......

   • A lot of substances jumbled together
   • One substance on its own
   • Two or more substances added together which can be easily separated
   • Two or more substances chemically joined together

3. Air is a mixture of different gases. Which list consists of gases present in the air?

   • Hydrogen, oxygen, carbon dioxide
   • Nitrogen, hydrogen, carbon dioxide
   • Nitrogen, oxygen, carbon dioxide
   • Nitrogen, oxygen, hydrogen

4. How would you separate a mixture of iron filings and sulphur?

   • Filter
   • Use a magnet
   • Use a sieve
   • Use tweezers

5. Alloys are mixtures of metals. Which is NOT an alloy?

   • Brass
   • Bronze
   • Chromium
   • Solder

6. A pure substance has a melting point which is .......

   • Higher than its freezing point
   • Lower than its boiling point
   • The same as its boiling point
   • The same as its freezing point

7. Which of the following is NOT a mixture?

   • Coca cola
   • Crude oil
   • Methane
   • Milk

8. The name given to the liquid which dissolves the solid in a solution is .......

   • Distillate
   • Saturated
   • Soluble
   • Solvent

9. The method used to separate coloured dyes in ink is .......

   • Chromatography
   • Distillation
   • Evaporation
   • Filtration

10. In a solution, the hotter the solvent .......

    • No more of the soluble solid dissolves
    • The less the solute dissolves
    • The quicker the soluble solid dissolves
    • The slower the solute dissolves

Quiz written by Sue Davison