IGCSE Organic Chemistry Practice Test

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• What is an ester and how is it formed?
• What happens when a halogenoalkane reacts with aqueous hydroxide?
• What is produced when two monomers condense?
• Which term describes the small molecule that repeats to form a polymer?
• Complete combustion of propane balanced equation?
• What is the monomer used to make polypropene?
• What does a structural formula show?
• How is high density polyethylene made?
• What process is used to separate crude oil into fractions?
• Which statement correctly identifies the monomer used to make polytetrafluoroethene?
• What is the displayed formula for methanol?
• During the bromine water test, what happens to the bromine species?
• What is the substitution reaction?
• How does the solubility of alcohols in water change with increasing carbon chain length?
• What apparatus is used in the production of ethanol by fermentation?
• A saturated molecule is defined as?
• The formula CH3OH represents methanol as which type of formula?
• Which fraction of crude oil is primarily used as petrol (car fuel)?
• What type of reaction converts ethanol to ethene?
• Structural formula for butene?
• Which of the following is a carboxylic acid?
• Structural formula for pentene?
• Which polymer would you associate with ropes and packaging?
• What happens to unreacted gases in the ethene hydration process described for ethanol production?
• Which is the structural formula for butane?
• Which statement describes addition polymerization in the context of polyethylene formation?
• When a carboxylic acid reacts with a carbonate, which of the following describes the products?
• If bromine water shows no color change with a sample, what does this indicate?
• Which catalyst is used to convert ethanol to ethene in dehydration?
• What happens if the reactants are put under a bright UV light?
• Which class follows the general formula CnH2n?
• What product forms when a primary alcohol is oxidized with a limited amount of oxidant?
• Which option shows the displayed formula for pentane?
• What is the structural formula for ethanol?
• What does a displayed formula show?
• Why is carbon monoxide dangerous?
• In cracking, what other products may be formed besides shorter-chain hydrocarbons?
• What is the functional group characteristic of carboxylic acids?
• In the bottom-to-top order of fractions, which is the heaviest fraction at the bottom?
• How can you distinguish an alkene from an alkane in a simple test?
• General formula for alkenes?
• Which of the following is an ester?
• What is the general molecular formula for alcohols and what functional group do they contain?
• What is the molecular formula for butene?
• Which of the following best defines a hydrocarbon?
• Describe the reaction of an alkene with halogens (Br2 or Cl2).
• In the bromine water test, what is the role of bromine?
• What is the structural formula for propanol?
• Which of the following describes a downside of using oil as an energy source?
• Which of the following best describes the properties of polythene?
• In fermentation to produce ethanol, what is the substrate?
• Describe the trend in a fractionating column at low temperature.
• How many carbon atoms are in propene?
• If there is a limited supply of oxygen during combustion of hydrocarbons what is produced?
• What is the repeating unit of PVC?
• Displayed formula for ethene, which option is correct?
• What is the ester formed from methanol and ethanoic acid?
• What happens when an ester undergoes hydrolysis under acidic conditions?
• What is the role of phosphoric acid in the ethene hydration reaction?
• What color is bromine water at the start of the test?
• What is the physical state of ethanol produced by the described hydration of ethene under the specified conditions?
• Pentane has how many carbon atoms in its chain?
• Which statement correctly describes how fractional distillation works?
• What is thermal decomposition?
• What is cracking in crude oil processing and why is it used?
• Describe the trend in a fractionating column at high temperature.
• What is a polymer and what is a monomer?
• What is a monomer?
• What polymer is formed from vinyl chloride and what is a common use?
• What does the term 'inert' mean?
• Which of the following are common uses of polypropene?
• What product forms when an alkene undergoes hydrogenation?
• Which polymer has chloroethene as its monomer?
• Which catalyst is used during industrial cracking?
• How do industrial and fermentation methods compare for ethanol production?
• What does an empirical formula show?
• The molecular formula for pentane is which of the following?
• What is the chemical formula for ethanoic acid?
• Which family do methane, ethane, propane, butane and pentane belong to?
• The structural formula CH3 CH2 CH3 corresponds to which alkane?
• What is the molecular formula for propanol?
• Alkenes undergo which type of reaction across the C=C bond?
• Why is sugar considered a renewable energy source in fermentation?
• An unsaturated molecule contains?
• How is ethene collected in the dehydration of ethanol?
• Which polymer's monomer has the formula C2H3Cl?
• Which statement best describes the lab cracking apparatus described?
• After a positive test, the bromine water becomes what color?
• The monomer of polytetrafluoroethene is?
• What type of reaction occurs when bromine adds to an alkene in this test?
• Which option shows the displayed formula for propane?
• What happens in an addition reaction?
• Which option shows the displayed formula for butane?
• In a homologous series, members are represented by a general formula and show what?
• Which test changes color from orange to green upon oxidation of primary or secondary alcohol?
• Polypropene is described as which of the following relative to polythene?
• Which is the structural formula for pentene?
• Which statement best describes the industrial production method for ethanol?
• Write the balanced equation for the complete combustion of ethanol (C2H5OH).
• What is added to PVC to make it more flexible?
• What type of reaction is polymerisation?
• If n = 5 in the general alkane formula CnH2n+2, what is the molecular formula?
• Which fraction in the list is typically used as petrol (gasoline) for cars?
• When bromine water is added to a sample containing an alkene, what happens to the color of the bromine water?
• Which statement best describes polymerisation?
• Which polymer is described as tough, durable, and used for containers such as milk bottles?
• Petrol-range hydrocarbons are typically in which carbon number range?
• Propanol contains which element besides carbon and hydrogen?
• Which statement best describes the difference between molecular and empirical formulas?
• At approximately what temperature does industrial cracking take place?
• What is the color of the acidified dichromate solution before oxidation?
• Give a common use of polyethene.
• What is the molecular formula of ethane?
• If an alkane has seven carbon atoms, its molecular formula is which?
• What is the structural formula for propanol?
• What is produced when ethanol undergoes dehydration with a catalyst?
• Why do esters often have fruity smells?
• What product forms when bromine water reacts with an alkene in this test?
• Which fraction is the lightest in the bottom-to-top order?
• During combustion of hydrocarbons with plenty of oxygen, which is produced?
• What is the molecular formula for butane?
• What is nylon used for?
• What is the general formula for alkanes?
• Name two common uses for ethanol.
• Which statement best describes complete combustion?
• Which polymer is commonly used to make milk bottles and containables?
• Which fraction is used as fuel for heavy vehicles such as trucks and buses?
• Displayed formula for butene, which option is correct?
• Which description best matches the appearance of crude oil?
• What is the molecular formula of methane?
• A saturated hydrocarbon contains only single bonds between carbon atoms.
• Which product forms when a secondary alcohol is oxidized?
• What is the molecular formula for methanol?
• Reaction of a carboxylic acid with carbonate produces which of the following?
• In polymer chemistry, what is the general result of polymerisation?
• Why is crude oil separated into fractions?
• What is the molecular formula for ethene?
• What is the molecular formula for pentene?
• What gas is evolved when acids react with carbonates such as calcium carbonate?
• Which crude oil fraction is matched correctly with its typical use?
• Which option lists the molecular formula for ethene?
• What is the monomer of PVC?
• What is produced when a carboxylic acid reacts with magnesium metal?
• Which of the following shows the structural formula for pentane?
• Which option shows the displayed formula for ethene?
• What is the polymer formed by polymerizing ethene?
• Which of the following describes the conversion of ethanol to ethene?
• In Fischer esterification, what type of catalyst is used?
• What is a disadvantage of the industrial method for producing ethanol?
• In the hydration/filtration method for producing ethanol from ethene, which conditions are described?
• Which fraction of crude oil is commonly used as domestic gas for cooking?
• Which statement is true about bromine water reacting with alkanes?
• What is the word equation for ethanol production through fermentation?
• What is the IUPAC name for the alkane with three carbon atoms?
• What does a catalyst do in the context of polyethylene production according to the material?
• What happens when bromine water is added to an alkane?
• What happens when bromine water is added to an alkene?
• In cracking, what is the primary purpose of a catalyst?
• What is the monomer unit of PVC?
• Which of the following is the displayed formula for methane?
• Which ester is represented by the chemical formula CH3COOCH3?
• Which process uses steam and a catalyst to produce ethanol industrially?
• What type of bonds are there between alkanes?
• How does increasing carbon chain length affect the boiling point of alkanes, and why?
• PVC is typically described as which of the following?
• What is the alternative industrial method to fermentation for producing ethanol?
• An alkane with four carbon atoms has which molecular formula?
• Which is the structural formula for methane?
• Which statement is true about ester formation from carboxylic acids and alcohols?
• What is the molecular formula for propane?
• Which fraction is commonly used as diesel fuel?
• What is a major disadvantage of the fermentation method for producing ethanol?
• What happens when halogenoalkanes react with aqueous sodium hydroxide?
• Which is the structural formula for ethane?
• Which molecular formula corresponds to pentene?
• Which of the following is NOT a listed use of PVC?
• What is the molecular formula for propene?
• What is the molecular formula for methane?
• What is the role of a catalyst in cracking and name a common type of catalyst?
• Structural formula for propene?
• What is a condensation reaction?
• In the bottom-to-top order of fractions, which is directly above bitumen?
• Displayed formula for pentene, which option is correct?
• An isomer is defined as?
• Structural formula for ethene?
• Which test is used to detect a carbon-carbon double bond in organic compounds?
• What is the displayed formula for propanol?
• Which option shows the displayed formula for ethane?
• If a compound has no double bond, bromine water will...
• After a positive bromine water test, the double bond is converted into which type of bond in the product?
• What is the general chemical formula for alkanes and what does it indicate about their hydrogen content?
• Which statement correctly describes the effect of UV light on the reaction mixture?
• Name two common esters and state one use for each.
• Which polymer is typically stronger than polythene but still tough and durable?
• A homologous series is characterized by?
• What general purpose does the bromine water test serve in organic chemistry?
• What is the monomer for polythene?
• In Fischer esterification, what is the role of concentrated sulfuric acid?
• What ester is formed when ethanol reacts with ethanoic acid?
• Which alkane has seven carbon atoms?
• Which statement correctly describes bonding in saturated vs unsaturated hydrocarbons?
• Which reagent acts as the oxidizing agent in the oxidation of alcohols with acidified dichromate?
• Which statement is true about the bromine water test for alkenes?
• Which ester is produced from methanol and ethanoic acid?
• What does volatile mean?
• What is the molecular formula for ethane?
• How do saturated and unsaturated hydrocarbons differ in their bonding?
• What is the general formula for alkenes?
• A hydrocarbon is defined as?
• Which of the following is an example of a condensation reaction?
• Which fraction lies directly below Refinery gases in the bottom-to-top order?
• Which is the structural formula for propane?
• Displayed formula for propene, which option is correct?
• Which statement correctly describes PVC compared with polythene?
• Which gas is produced when a carboxylic acid reacts with carbonate?
• Which of the following represents complete combustion of a hydrocarbon with sufficient oxygen?
• Give an example of a saturated hydrocarbon and an unsaturated hydrocarbon.
• Which statement best describes the substitution reaction described in the material?
• What is the displayed formula for ethanol?
• What type of polymerization produces polyethene?
• Polythene is commonly used to make which of the following items?
• Which statement is true about the general formula for saturated alcohols?
• What are the products of complete combustion of a hydrocarbon?
• How does benzene typically respond to bromine water in a simple test for unsaturation?
• How long are the carbon chains in the manufacture of polyethylene?
• Which oxidizing agent is used in the qualitative test for alcohol oxidation?
• What is the name of the reaction between a carboxylic acid and an alcohol to form an ester?
• What is the molecular formula for ethanol?
• Which of the following is a common use for PVC?
• What is the structural formula for methanol?
• What is an advantage of the fermentation method for producing ethanol?
• Which of the following best describes a condensation polymerisation process?
• Which method is described for producing ethanol via fermentation?
• When ethene is treated with bromine water, what change is observed?
• Which statement correctly describes the oxidation products of primary and secondary alcohols?
• Which class of hydrocarbons yields a color change with bromine water?
• What does a molecular formula show?
• What is the molecular formula for pentane?
• How can you test for the presence of an alkene in a hydrocarbon sample?