Look at the displayed formula of an organic compound.
What is the name of this compound?
Butanoic acid
Butanol
Propanoic acid
Propanol
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Look at the displayed formula of an organic compound.
What is the name of this compound?
Butanoic acid
Butanol
Propanoic acid
Propanol
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What is the name of the process that converts large alkane molecules into smaller alkane molecules?
Cracking
Fractional distillation
Hydrogenation
Polymerisation
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Which displayed formula shows an alkene?
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A student bubbles ethene gas into bromine water.
What is observed?
Colour change from blue to colourless
Colour change from colourless to orange
Colour change from orange to colourless
Orange precipitate is made
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Heptane is an alkane with seven carbons.
What is the chemical formula of heptane?
C7H10
C7H12
C7H14
C7H16
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The complete combustion of pentane, C5H12, takes place in the following unbalanced equation:
_C5H12 + _O2 → _CO2 + _H2O
What numbers will balance the reaction?
1,4,5,3
1,8,5,6
2,8,5,6
2,4,5,6
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Which of the following molecules is an alkene?
C6H10
C4H10
C5H10
C6H14
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Which molecule can be cracked to produce hexane, C6H14?
C4H8
C4H10
C6H12
C10H22
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Which of the following shows the product of the reaction between propene and bromine?
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Crude oil is a mixture of hydrocarbons.
Crude oil is separated into useful fractions.
Which of these mixtures of substances could be in a fraction from crude oil?
C2H4, C4H10, C4H10O
C2H4, C2H3Br, C4H10
C2H6, C3H8, C4H10
C2H6, C2H3Br, C4H10O
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Crude oil is separated into useful fractions by fractional distillation.
The diagram shows the useful fractions made in fractional distillation.
Which of these fractions has the weakest intermolecular forces?
Bitumen
Diesel oil
Gases
Petrol
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Crude oil is separated into fractions by fractional distillation.
Look at the diagram of the fractions made in fractional distillation.
Which of these fractions has the lowest boiling point?
Bitumen
Diesel oil
Gases
Petrol
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What type of reaction takes place between an alkene and hydrogen?
Addition
Dehydration
Neutralisation
Thermal decomposition
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Ethene, C2H4, reacts with bromine, Br2, in an addition reaction.
Which is the balanced symbol equation for this reaction?
C2H4 + Br2 → C2H3Br + HBr
C2H4 + Br2 → C2H4Br2
C2H4 + 2Br2 → C2Br4 + 2H2
C2H4 + 2Br2 → C2H4Br4
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The bar chart shows the amount of some fractions made from 100 tonnes of crude oil by fractional distillation.
It also shows the amount of each fraction needed for everyday uses.
Cracking converts large molecules into smaller more useful molecules to make the supply match the demand.
Which fractions are most likely to be cracked to make the supply match the demand?
Gas oil and fuel oil
Gas oil and petrol
Naphtha, paraffin and fuel oil
Petrol and gases
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What is the formula of the product in this equation?
C2H2Br
C3Br4
C2H3Br
C2H4Br2
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What is the general formula of the fractions produced by the fractional distillation of crude oil?
CnH2n
CnH2n+2
C2H2n+1OH
C2n+2H2
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A student reacts a hydrocarbon with bromine water.
The formula of the product is C3H6Br2.
Which is the displayed formula of the hydrocarbon?
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A student bubbles ethene gas into bromine water.
Which displayed formula shows the product of this reaction?
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Crude oil is separated into fractions by fractional distillation.
Look at the diagram of the fractions made in fractional distillation
Which of these fractions has the strongest intermolecular forces?
Bitumen
Diesel oil
Gases
Kerosene
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