The Sea and Solubility - Quiz - gcsescience.com.

1. The sea is salty. The salt comes from

a) A supermarket

b) A train station

c) Sunlight reacting with the water

d) The weathering of rocks

 

2. The main salt in the sea is

a) Sodium chloride

b) Sodium bromide

c) Potassium chloride

d) Saxa nitrate

 

3. Bromine can be extracted from the sea by

a) Boiling it

b) Freezing it

c) Bubbling chlorine through it

d) Bubbling oxygen through it

 

4. More solid will dissolve in water if you

a) Decrease the temperature

b) Increase the temperature

c) Increase the surface area

d) Decrease the surface area

 

5. More gas will dissolve in water if you

a) Decrease the temperature

b) Increase the temperature

c) Decrease the surface area

d) Increase the surface area

 

6. Sodium, potassium and ammonium compounds

a) Turn green when wet

b) Turn green when dry

c) Never dissolve in water

d) Always dissolve in water

 

7. Two chlorides which do not dissolve in water are

a) Silver and lead

b) Silver and sodium

c) Sodium and copper

d) Copper and lead

 

                       
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