@What is catalytic cracking?
Breaking large molecules into smaller ones
Oxidation of a substance
The formation of polymers

@Elements in Group I are called:
Alkali metals
Alkaline earth metals
Halogens

@The graphs show the amount of product produced against time for 4 chemical reactions. Which produced the MOST product?
#rrate_1
Reaction y
Reaction w
Reaction z

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

@Which metal is used in the production of compact discs (CD's)?
Aluminium
Steel
Chromium

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

@The temperature shown on this thermometer is:
#thermom1
43.8
48.0
43.2

@To separate large pieces of glass from water, what technique would be best?
Decanting
Dissolving, filtering and evaporation
Sublimation

@What is the mass of each element present in one mole of calcium chloride (CaCl)?
Calcium, 40g and Chlorine, 71g
Calcium, 20g and Chlorine, 35.5g
Calcium, 80g and Chlorine, 35.5g

@For an alkali, one of these statements is wrong. Which?
Insoluble in water
A base which dissolves in water
A substance with a pH between 7 and 14

@What is the name of the scientist connected with much of the early work on electrochemistry?
Michael Faraday
Charles Darwin
Joseph Priestley

@How is the 'heat change' in a chemical reaction defined?
Difference in the energy between the products and reactants
The total energy of the reactants and the products
The energy of the products only

@Which statement about covalent bonds is true?
They are as strong as ionic bonds
They are present in some metals
They are the weakest type of bonds found

@Hydrogen burns, but water (which contains hydrogen and oxygen) does not. This is because:
Compounds do not have the same properties as the things they are made from
Oxygen stops burning from taking place
Hydrogen will only burn when there is no oxygen

@Which one of the following contains the same number of electrons as neon?
O
Li
Cl-

@During the production of iron from iron ore, which one of the following is NOT used in the blast furnace?
Slag
Limestone
Coke

@The type of bonding in metals is called:
Metallic bonding
Ionic bonding
Hydrogen bonding

@What would happen if magnesium was added to silver nitrate solution?
Silver would be deposited
Nothing
Hydrogen gas would be produced

@Which one of the following is NOT a property of diamond?
Low melting point
Transparent
Does not conduct electricity

@Why is chlorine added to water in swimming pools?
Disinfect the water
As a bleaching agent
To soften the water

@To make hydrogen in the lab, what two substances are usually used?
Hydrochloric acid and zinc
Sulphuric acid and copper
Sodium hydroxide and magnesium

@Nitrogen from the air is needed to make ammonia. The nitrogen is obtained by:
Fractional distillation of the air
Bubbling the air through water
Diffusion of the air

@Air is passed through sodium hydroxide solution, and then over heated copper. The gases removed during this process are:
Carbon dioxide and oxygen
Oxygen and water vapour
Nitrogen and carbon dioxide

@Sulphuric acid is made by the:
Contact process
Frasch process
Electrolysis process

@From the following list choose TWO alkenes: Methane, petrol, hydrogen, propene, butane & ethene.
Ethene and propene
Petrol and butane
Methane and ethene

@An element does not conduct electricity. Using this information only, the element is likely to belong in:
Group 7 (the halogens)
Group 1 (the alkali metals)
The transition elements

@In an expeiment it was found that four 1g lumps reacted faster than a single 4g lump. This was because:
#area
The 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

@Zn + CuO  ZnO + Cu Which of the following statements is correct?
Copper atoms lose 2 electrons
Zinc is oxidised
Copper is reduced

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