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- @What is catalytic cracking?
- Breaking large molecules into smaller ones
- Oxidation of a substance
- The formation of polymers
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- @Elements in Group I are called:
- Alkali metals
- Alkaline earth metals
- Halogens
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- @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
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- @Which one of the following is most easily reduced by heating in a stream of hydrogen?
- Copper II oxide
- Aluminium oxide
- Iron oxide
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- @Which metal is used in the production of compact discs (CD's)?
- Aluminium
- Steel
- Chromium
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- @A car, just ticking over, does not produce which one of the following?
- Sulphur dioxide
- Water vapour
- Carbon dioxide
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- @The temperature shown on this thermometer is:
- #thermom1
- 43.8Ì
- 48.0Ì
- 43.2Ì
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- @To separate large pieces of glass from water, what technique would be best?
- Decanting
- Dissolving, filtering and evaporation
- Sublimation
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- @What is the mass of each element present in one mole of calcium chloride (CaClÛ)?
- Calcium, 40g and Chlorine, 71g
- Calcium, 20g and Chlorine, 35.5g
- Calcium, 80g and Chlorine, 35.5g
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- @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
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- @What is the name of the scientist connected with much of the early work on electrochemistry?
- Michael Faraday
- Charles Darwin
- Joseph Priestley
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- @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?
- OÎ×
- Liä
- 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 ï 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