@In an expeiment it was found that four 1g lumps reacted faster than a single 4g lump. This was because:
#area
The combined surface area with the four 1g lumps was larger
The 1g lumps were more free to move around
Four 1g lumps are more concentrated than a single 4g lump

@Which one of the following is most easily reduced by heating in a stream of hydrogen?
Copper II oxide
Aluminium oxide
Iron oxide

@What liquid is used to 'top up' car batteries?
Distilled water
Nitric acid
Hydrochloric acid

@Damage to the metal parts of buildings is caused indirectly by:
Sulphur dioxide
Carbon dioxide
Lead emissions from cars

@What is a 'pure' substance?
Something that is made of just a single substance
A substance that contains no germs
A substance with a melting point that covers several degrees

@Oxygen and nitrogen can be separated from the air by fractional distillation because:
Nitrogen has a different boiling point from oxygen
Oxygen is more reactive than nitrogen
Oxygen is more soluble than nitrogen

@?HO  2HO + O The number needed to balance the equation is:              
2
1
4

@For neutralisation, an acid added to an alkali produces:
A salt and water
Hydrogen and water
Carbon dioxide

@The diagram shows a Hoffmann voltameter, connected to a power supply. The blue liquid is water, with a little sulphuric acid in it. The gas X is:
#hoff
Oxygen
Hydrogen
Sulphur dioxide

@Covalent bonds are NOT present in which one of the following substances?
Copper
Diamond
Sulphur

@Air, water, hydrogen, brass, silver nitrate & tin. From the list, how many substances are elements?
Two
One
Four

@In a liquid:
Molecules move about, but are quite close to each other
Molecules can't move - they can only vibrate slightly
Molecules can move freely in any direction they want

@Which one of the following, about the charges of particles, is correct?
Protons positive, electrons negative and neutrons neutral
Neutrons & protons positive and electrons negative
Neutrons negative, protons and electrons neutral

@A substance not used in the production of iron is:
Sulphur
Hot air
Coke

@If magnesium turnings are shaken with water, they sink at first and then rise to the surface. This is because:
Magnesium reacts to form hydrogen, which stick to the turnings, making them lighter
Air bubbles are trapped in the turnings
The turnings become coated in an oxide

@Which one of the following would be most suitable to prepare hydrogen gas from hydrochloric acid?
Zinc
Calcium
Copper

@Which one of the following is a property of graphite?
Conducts electricity
Fairly hard substance
Transparent

@Which of the following is a possible source for bromine?
Sea water
Bauxite
Haemetite

@Which of the following statements is correct?
Hydrogen molecules travel much faster than air molecules
Hydrogen and air molecules travel at about the same speed
Hydrogen molecules only travel very slowly

@Which one of the following is used as a fertilizer?
Ammonium sulphate
Copper II sulphate
Sodium sulphate

@Oxygen can be prepared in the lab by:
Adding manganese IV oxide to hydrogen peroxide
Heating copper II oxide
Heating lead II carbonate

@Sulphur burns in air to form:
Sulphur dioxide
Sulphur monoxide
Sulphur trioxide

@The name of this substance is:
#propene
Propene
Propanol
Propane

@Periods on the periodic table are:
Horizontal rows
Vertical columns
Non metals

@Magnesium in tube Y is reacting more slowly than in tube X. To speed up tube Y you could:
#ttube
Heat test tube Y a little
Shake tube Y
Add more acid (blue liquid)

@Which one of the following changes is oxidation?
CuO  CuO
N  NH
FeCl  FeCl

@Before river water can be used in the home it is purified by:
filtration and chlorination
distillation and neutralisation
neutralisation and filtration

@A car, just ticking over, does not produce which one of the following?
Sulphur dioxide
Water vapour
Carbon dioxide

@The substance most likely to be found in this thermometer is:
#thermom1
Mercury
Silver
Water