Tests for Ions - Quiz - gcsescience.com.

1. A flame test can be done on a solid.
     The colour for potassium ions is

a) Blue

b) Lilac

c) Green

d) Red

 

2. Metal ions in solution can be identified by adding
      a few drops of sodium hydroxide solution.
      If no precipitate is formed, the metal is

a) Sodium or calcium

b) Sodium or potassium

c) Copper

d) Iron

 

3. Metal ions in solution can be identified by adding
      a few drops of sodium hydroxide solution.
      If a blue precipitate is formed, the metal is

a) Sodium or calcium

b) Sodium or potassium

c) Copper

d) Iron

 

4. Some carbonates change colour when they are heated.
      Copper carbonate changes from

a) Blue to brown

b) Blue to black

c) Green to brown

d) Green to black

 

5. Barium chloride will give a white precipitate with sulfate ions.
      A little acid is added to the test to

a) Speed it up

b) Remove any carbonate or sulfite ions

c) Make it stronger

d) Remove any hydrocarbon ions

 

6. To test for nitrate ions you must
      add sodium hydroxide solution and

a) Hydrochloric acid

b) Sulfuric acid

c) Nitric acid

d) Aluminium powder

 

7. Silver nitrate is used to identify bromide, chloride and iodide
      ions. The colour of the precipitate with iodide ions is

a) White

b) Yellow

c) Brown

d) Black

 

                       
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