DP Chemistry Questionbank

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• 18M.2.sl.TZ1.3a.ii: Outline the formation of polyethene from ethene by drawing three repeating units of the polymer.
• 17N.3.sl.TZ0.8b.i: State the type of reaction occurring during the titration.
• 17N.2.sl.TZ0.6b: Explain, with the help of equations, the mechanism of the free-radical substitution reaction of...
• 17N.2.sl.TZ0.6a.ii: State the observation expected for each reaction giving your reasons.
• 17N.2.sl.TZ0.6a.i: Deduce the type of chemical reaction and the reagents used to distinguish between these compounds.
• 17N.1.sl.TZ0.27: Which type of reaction occurs between an alcohol and a carboxylic acid? A. Addition B....
• 17N.1.sl.TZ0.25: Which compound can be oxidized when heated with an acidified solution of...
• 17N.1.sl.TZ0.24: What is the major product of the reaction between HCl and but-2-ene? A. 1,2-dichlorobutane B....
• 18M.2.sl.TZ2.7b.ii: The aldehyde can be further oxidized to a carboxylic acid. Outline how the experimental...
• 18M.2.sl.TZ2.7b.i: Formulate the ionic equation for the oxidation of propan-1-ol to the corresponding aldehyde by...
• 18M.1.sl.TZ2.26: What is the mechanism for the reaction of propene with iodine in the dark? A.     electrophilic...
• 18M.2.sl.TZ1.3d: State the characteristic reaction mechanism of benzene.
• 18M.2.sl.TZ1.3a.i: Ethyne, like ethene, undergoes hydrogenation to form ethane. State the conditions required.
• 18M.1.sl.TZ1.27: Which compound could be formed when CH3CH2CH2OH is heated with acidified potassium...
• 18M.1.sl.TZ1.26: Which of these reactions proceeds by a free radical mechanism in the presence of UV light? A.   ...
• 18M.1.sl.TZ1.25: What is the product of the reaction between hex-3-ene and steam? A.     Hexan-1-ol B.   ...
• 18M.2.hl.TZ1.7c.i: State the organic product of the reaction between 1-chlorobutane, CH3CH2CH2CH2Cl, and aqueous...
• 18M.2.hl.TZ1.3b: Ethyne reacts with chlorine in a similar way to ethene. Formulate equations for the following...
• 18M.2.hl.TZ1.3a.ii: Outline the formation of polyethene from ethene by drawing three repeating units of the polymer.
• 18M.2.hl.TZ1.3a.i: Ethyne, like ethene, undergoes hydrogenation to form ethane. State the conditions required.
• 18M.1.hl.TZ2.35: Which is the correct combination of substitution reaction mechanisms?
• 18M.1.hl.TZ1.40: Which would be the most effective method to distinguish between liquid propan-1-ol and...
• 18M.1.hl.TZ1.33: Which monomer could create this polymer? A.     But-2-ene B.     But-1-ene C.   ...
• 17M.3.hl.TZ2.3c.ii: Suggest, giving one reason, whether this is an addition or condensation reaction.
• 17M.2.hl.TZ2.7b.ii: Deduce the structural formula of the main organic product when hex-1-ene reacts with hydrogen...
• 17M.2.hl.TZ2.7b.i: Bromine was added to hexane, hex-1-ene and benzene. Identify the compound(s) which will react...
• 17M.2.hl.TZ2.6b: The overall equation for monochlorination of methane is: CH4(g) + Cl2(g) → CH3Cl(g) +...
• 17M.2.hl.TZ2.2a.v: Identify one organic functional group that can react with acidified K2Cr2O7(aq).
• 17M.2.sl.TZ2.6c: Polyvinyl chloride (PVC) is a polymer with the following structure. State the structural...
• 17M.2.sl.TZ2.6b: Bromine was added to hexane, hex-1-ene and benzene. Identify the compound(s) which will react...
• 17M.2.sl.TZ2.6a: Using relevant equations, show the initiation and the propagation steps for this reaction.
• 17M.1.sl.TZ2.26: Which conditions are used to convert ethanol to ethanal? A.     Excess oxidizing agent and...
• 17M.1.sl.TZ2.25: Which describes the reaction between a halogen and ethane?
• 17M.3.hl.TZ1.9a: Deduce the repeating unit of the polymer and the other product of the reaction.
• 17M.2.sl.TZ1.6b: State the typical reactions that benzene and cyclohexene undergo with bromine.
• 17M.2.sl.TZ1.6a: Discuss the physical evidence for the structure of benzene.
• 17M.2.sl.TZ1.5d: Chloroethene, C2H3Cl, can undergo polymerization. Draw a section of the polymer with three...
• 17M.2.sl.TZ1.5b: Formulate equations for the two propagation steps and one termination step in the formation of...
• 17M.2.sl.TZ1.5a: Ethane, C2H6, reacts with chlorine in sunlight. State the type of this reaction and the name of...
• 17M.1.hl.TZ1.35: What is the major product of the reaction between 2-methylbut-2-ene and hydrogen bromide? A.    ...
• 16N.3.sl.TZ0.17b: Oseltamivir does not possess the carboxyl group needed for activity until it is chemically...
• 16N.3.sl.TZ0.2b: In trial 3, the students noticed that after heating, the crucible had turned black on the...
• 16N.2.sl.TZ0.5b: Both propane and propene react with bromine. (i) State an equation and the condition required...
• 16N.2.sl.TZ0.1d: Ethane-1,2-diol can be oxidized first to ethanedioic acid, (COOH)2, and then to carbon dioxide...
• 16N.1.sl.TZ0.26: Which type of reaction occurs when methanol and propanoic acid react together in the presence of...
• 16N.1.sl.TZ0.25: Which monomer is used to form the polymer with the following repeating unit? A....
• 16M.2.hl.TZ0.5a: (i) State the term that is used to describe molecules that are related to each other in the same...
• 16M.2.sl.TZ0.4b: Compound B is related to compound A. (i) State the term that is used to describe molecules...
• 16M.2.sl.TZ0.4a: (i) State the name, applying IUPAC rules, of compound A. (ii) Draw a section, showing three...
• 16M.1.sl.TZ0.26: What is the mechanism of the reaction between ethane and chlorine in sunlight? A....
• 16M.1.sl.TZ0.25: Which compound can both be esterified and turn acidified potassium dichromate(VI) solution...
• 15M.1.hl.TZ1.35: What is the product of the addition of chlorine, \({\text{C}}{{\text{l}}_{\text{2}}}\), to...
• 15M.2.hl.TZ1.5a: State an equation for the formation of ethanol from ethene and the necessary reaction...
• 15M.2.hl.TZ1.5d: State the equation for the acid-catalysed reaction of ethanol with propanoic acid and state the...
• 15M.2.hl.TZ1.6a: State the equation for the reaction between methane and bromine to form bromomethane.
• 15M.2.hl.TZ1.6b.i: Explain, using equations, the complete free-radical mechanism for the reaction of methane with...
• 15M.2.hl.TZ1.6b.ii: Bromomethane reacts with aqueous sodium hydroxide. State the organic product of this reaction.
• 15M.2.hl.TZ1.7a.i: Ethanol is a primary alcohol that can be oxidized by acidified potassium dichromate(VI)....
• 15M.2.hl.TZ2.10a.i: Deduce the full structural formula of compound A.
• 15M.2.hl.TZ2.10a.iii: Describe the colour change observed when excess but-2-ene reacts with bromine to form compound A.
• 15M.2.hl.TZ2.10b: (i)     Outline two reasons why the polymerization of alkenes is of economic...
• 15M.2.hl.TZ2.10g: Deduce the equation for the complete combustion of compound C.
• 15M.1.sl.TZ1.24: Which species can oxidize ethanol to ethanoic acid? A.     \({{\text{I}}^ - }\) B.     Fe C.  ...
• 15M.1.sl.TZ1.28: Which statements about the chlorine free radical are correct? I.     It has 18 electrons. II. ...
• 15M.1.sl.TZ1.29: Which statement is correct about the polymerization of ethene to poly(ethene)? A.     The...
• 15M.1.sl.TZ1.26: Which compound could be X in the two-stage reaction...
• 15M.1.sl.TZ2.28: Which statements are correct for the reaction of ethene with bromine in the absence of...
• 15M.2.sl.TZ1.2a: State the equation for the reaction between methane and bromine to form bromomethane.
• 15M.2.sl.TZ1.2b: Explain, using equations, the complete free-radical mechanism for the reaction of methane with...
• 15M.2.sl.TZ1.5a: (i)     State an equation for the formation of ethanol from ethene and the necessary reaction...
• 15M.2.sl.TZ2.7a.i: Deduce the full structural formula of compound A.
• 15M.2.sl.TZ2.7g.ii: Deduce the equation for the complete combustion of compound C.
• 15M.2.sl.TZ1.7c.i: Ethanol is a primary alcohol that can be oxidized by acidified potassium dichromate(VI)....
• 15M.2.sl.TZ2.4b: Ethane, a member of the homologous series of alkanes, can react with bromine. Explain the...
• 15M.2.sl.TZ2.7a.iii: Describe the colour change observed when excess but-2-ene reacts with bromine to form compound A.
• 15M.2.sl.TZ2.7b: State the names of the reagents D and E.
• 15M.2.sl.TZ2.7c: (i)     Outline two reasons why the polymerization of alkenes is of economic...
• 15M.2.sl.TZ2.7d: Compound C, \({{\text{C}}_{\text{4}}}{{\text{H}}_{\text{9}}}{\text{OH}}\), can also be formed...
• 14M.1.hl.TZ2.39: What is the structural formula of the ester formed by reacting propanoic acid with...
• 14M.2.hl.TZ1.4a: State the conditions necessary for this reaction.
• 14M.2.hl.TZ1.6a: Alcohols with the molecular formula \({{\text{C}}_{\text{4}}}{{\text{H}}_{\text{9}}}{\text{OH}}\)...
• 14M.2.hl.TZ1.8d.i: Deduce the mechanism for the reaction using equations and curly arrows to represent the movement...
• 14M.1.sl.TZ1.29: For the reaction pathway below, what are the names for the first and second...
• 14M.2.sl.TZ1.6b: (i)     Deduce the oxidation number of chromium in...
• 14M.2.sl.TZ1.7d: (i)     Identify the reagent necessary for this reaction to occur.   (ii)     Deduce the...
• 14M.2.sl.TZ1.7f: Bromoethene, \({\text{C}}{{\text{H}}_{\text{2}}}{\text{CHBr}}\), can undergo polymerization. Draw...
• 14M.2.sl.TZ2.3b: Combustion also often forms carbon and carbon monoxide. Outline what reaction conditions result...
• 14M.2.sl.TZ2.3c: (i)     State the type of polymerization that occurs.   (ii)     Draw the structure of a...
• 14M.2.sl.TZ2.6b: State the reagent required to convert A into B.
• 14M.2.sl.TZ2.6c: (i)     State the conditions required for this reaction to occur.   (ii)     Outline why it...
• 14M.2.sl.TZ2.6e: A can also be converted into C without going via B. State the reagent and conditions required.
• 14M.2.sl.TZ2.6f: (i)     State why C is not readily oxidized by acidified potassium dichromate(VI).     (ii)   ...
• 14M.2.sl.TZ2.6g.i: State the conditions required for this reaction to occur.
• 14N.1.hl.TZ0.34: Which product is formed when bromine water is added to propene,...
• 14N.1.hl.TZ0.36: Which of these repeating units is present in the polymer poly(propene)?
• 14N.2.hl.TZ0.9c: (i)     Determine the organic product formed when each of the compounds is heated under reflux...
• 14N.2.hl.TZ0.9f: (i)     Pentanoic acid reacts with ethanol. State the structural formula of the organic product...
• 14N.1.sl.TZ0.28: Which equation represents a propagation step in the reaction of methane with bromine? A.    ...
• 14N.2.sl.TZ0.4d: State a balanced equation for the complete combustion of D-fructose.
• 14N.2.sl.TZ0.7c: Determine the organic product formed when each of the compounds is heated under reflux with...
• 14N.3.sl.TZ0.26d: Propanone could also be formed from propene by reaction with steam over an acidic catalyst,...
• 13N.1.hl.TZ0.39: What is the organic product of the reaction between butan-1-ol and ethanoic acid on heating using...
• 13N.2.hl.TZ0.8a: State the other substances required to convert 2-methylbut-2-ene to 2-methylbutan-2-ol.
• 13N.2.hl.TZ0.8b: Explain whether you would expect 2-methylbutan-2-ol to react with acidified potassium...
• 13N.1.sl.TZ0.27: What is the function of the ultraviolet light used in the reaction between ethane and...
• 13N.2.sl.TZ0.2c: Traces of butane, \({{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}}\), are also found amongst...
• 13N.1.sl.TZ0.29: Which organic product forms in the following...
• 13N.2.sl.TZ0.2a: Complete the overall equation for this reaction by stating the...
• 13N.2.sl.TZ0.2b: State the type of mechanism by which this reaction occurs.
• 13N.2.sl.TZ0.6b: State the other substances required to convert 2-methylbut-2-ene to 2-methylbutan-2-ol.
• 13N.2.sl.TZ0.6c: Explain whether you would expect 2-methylbutan-2-ol to react with acidified potassium...
• 13M.2.hl.TZ1.9a.ii: Describe a test to distinguish but-2-ene from butane, including what is observed in each case.
• 13M.2.hl.TZ1.9a.iii: 2-bromobutane can be produced from but-2-ene. State the equation of this reaction using...
• 13M.1.sl.TZ1.27: Which steps are involved in the free-radical mechanism of the bromination of ethane in the...
• 13M.1.sl.TZ1.28: Which substance can be polymerized to produce the polymer below? A.     But-1-ene B.   ...
• 13M.2.sl.TZ1.5c: Describe, using an equation, the oxidation by acidified potassium dichromate(VI) of the substance...
• 13M.2.sl.TZ1.8a.ii: Describe a test to distinguish ethene from ethane, including what is observed in each case.
• 13M.2.sl.TZ1.8a.iii: Bromoethane can be produced either from ethene or from ethane. State an equation for each reaction.
• 13M.2.sl.TZ1.8b.i: State the equation for the reaction of...
• 13M.2.sl.TZ1.8c.v: Describe, using an equation, how \({{\text{C}}_{\text{4}}}{{\text{H}}_{\text{9}}}{\text{Br}}\)...
• 13M.1.hl.TZ2.33: What are possible products of the incomplete combustion of propan-2-ol? A.     carbon monoxide,...
• 13M.2.hl.TZ2.8d.iii: State the structural formula of the organic products, Q, R, S and T, formed in the following...
• 13M.2.hl.TZ2.8d.v: State the structural formula of the organic product formed, U, when R is heated under reflux with...
• 13M.1.sl.TZ2.28: What are possible products of the incomplete combustion of propane? A.     carbon monoxide,...
• 13M.1.sl.TZ2.29: Which equation represents a propagation step in the mechanism for the reaction between ethane,...
• 13M.2.sl.TZ2.3a.ii: State the name of the compound formed that is responsible for this decreased pH value.
• 13M.2.sl.TZ2.6c.iv: Draw the structure of poly(chloroethene) showing two repeating units.
• 13M.2.sl.TZ2.7c.iii:
• 13M.2.sl.TZ2.7c.iv: Identify a suitable catalyst used in the reaction to form R.
• 13M.2.sl.TZ2.7c.v: P, CH3CH=CHCH3, reacts with HBr to form CH3CHBrCH2CH3. Suggest one suitable mechanism for the...
• 13M.2.sl.TZ2.7c.viii: P can undergo a polymerization reaction. Draw two repeating units of the resulting polymer.
• 13M.2.sl.TZ2.7c.vi: State the structural formula of the organic product formed, S, when Q is heated under reflux with...
• 12N.2.hl.TZ0.1f.iii: One important use of chlorine is in the synthesis of poly(chloroethene), PVC. Identify the...
• 12N.2.sl.TZ0.6a.iv: State the balanced chemical equation for the reaction of X with HBr to form Y.
• 12N.2.sl.TZ0.6a.vii: Deduce the structural formula of the organic product formed when Z is oxidized by heating under...
• 12N.1.sl.TZ0.28: Which compound would decolourize bromine water in the dark? A.    ...
• 12N.1.sl.TZ0.29: Some methane gas is burned in a limited supply of oxygen. Which products could form? I.   ...
• 12N.2.sl.TZ0.6a.v: Y reacts with aqueous sodium hydroxide, NaOH(aq), to form an alcohol, Z. Identify whether Z is a...
• 10N.2.hl.TZ0.2c: Identify the structural formula of an isomer of but-2-ene which does not decolourize bromine...
• 10N.2.hl.TZ0.2d: (i)     Outline two reasons why the polymers of the alkenes are of economic importance. (ii)    ...
• 10N.2.hl.TZ0.5c: State the reagent and conditions needed for reaction 1.
• 10N.2.hl.TZ0.5d: Reaction 1 involves a free-radical mechanism. Describe the stepwise mechanism, by giving...
• 10N.1.sl.TZ0.28: Which monomer could be used to form a polymer with the following repeating unit? A.    ...
• 10N.2.sl.TZ0.2b: Bromine water, Br2(aq), can be used to distinguish between the alkanes and the alkenes. (i)    ...
• 10N.2.sl.TZ0.2c: (i)     Outline two reasons why the polymers of the alkenes are of economic importance. (ii)    ...
• 10N.2.sl.TZ0.4e: State the name of the product and identify the type of reaction which occurs between ethene and...
• 10N.2.sl.TZ0.5d: Reaction 1 involves a free-radical mechanism. Describe the stepwise mechanism, by giving...
• 10N.2.sl.TZ0.5c: (i)     State the reagent and conditions needed for reaction 1. (ii)     State the reagent(s)...
• 09N.1.hl.TZ0.34: Which reaction occurs via a free-radical mechanism? A.    ...
• 09N.1.hl.TZ0.38: What is the name of the ester formed when...
• 09N.1.sl.TZ0.28: Which substance is not produced during the combustion of alkanes? A.    ...
• 09N.2.sl.TZ0.4b: Both \({{\text{C}}_{\text{5}}}{{\text{H}}_{{\text{12}}}}\) and...
• 09N.2.sl.TZ0.7a.i: State an equation for the reaction of...
• 09N.2.sl.TZ0.7b.ii: On reaction with acidified potassium dichromate(VII), two of the isomers are oxidised in two...
• 09N.2.sl.TZ0.7b.iii: A third isomer is oxidized in one step. Draw the structural formula of the organic product formed.
• 09N.2.sl.TZ0.7b.v: Identify the isomer which resists oxidation by acidified potassium dichromate(VI).
• 09N.2.sl.TZ0.7b.iv: State the colour change that takes place in these oxidation reactions.
• 10M.2.sl.TZ1.3a.ii: Draw a section of poly(chloroethene) containing six carbon atoms.
• 10M.2.sl.TZ1.3b.ii: State the reagents and conditions necessary to prepare ethanoic acid from ethanol in the laboratory.
• 10M.2.sl.TZ1.6c: (i)     Below are four structural isomers of alcohols with molecular formula...
• 10M.3.sl.TZ1.G2b: (i)     bromine. (ii)     hydrogen bromide.
• 10M.3.sl.TZ1.G2a: Explain how a bromine molecule is able to act as an electrophile.
• 10M.1.sl.TZ2.28: What happens when a few drops of bromine water are added to excess hex-1-ene and the mixture is...
• 10M.1.sl.TZ2.29: What is the product of the following...
• 10M.2.sl.TZ2.7a.i: The reaction of alkenes with bromine water provides a test for unsaturation in the laboratory....
• 10M.2.sl.TZ2.7c: (i)     Deduce the structural formulas of the two alcohol isomers of molecular formula...
• 10M.3.sl.TZ2.G2: Hydrolysis of aliphatic and aromatic halides occurs under different conditions. State an...
• 09M.1.sl.TZ1.28: When bromine water is shaken with a liquid organic compound, it is rapidly decolourized. What can...
• 09M.1.sl.TZ1.29: Which conditions are required to obtain a good yield of a carboxylic acid when ethanol is...
• 09M.2.sl.TZ1.7a.iii: When propan-1-ol is oxidized using a warm acidified solution of potassium dichromate(VI) two...
• 09M.3.sl.TZ1.D3b.i: Describe the colour change of potassium dichromate(VI) when it reacts with ethanol.
• 09M.1.hl.TZ2.33: What structural feature must a molecule have in order to undergo addition polymerization? A.   ...
• 09M.1.sl.TZ2.29: Which equations represent the incomplete combustion of methane? I.    ...
• 09M.1.sl.TZ2.26: What is the product of the oxidation of butan-2-ol? A.     But-2-ene B.     Butanoic acid C. ...
• 09M.2.sl.TZ2.6a.vi: Ethene can be converted into ethanol by direct hydration in the presence of a catalyst according...
• 09M.2.sl.TZ2.6a.iv: Ethanol can be oxidized using acidified potassium dichromate,...
• 11M.1.hl.TZ1.36: What is the correct order of reaction types in the following sequence?
• 11M.2.hl.TZ1.7b: Deduce an equation for the reaction between propanoic acid and methanol. Identify the catalyst...
• 11M.2.sl.TZ1.6e: State and explain whether the following molecules are primary, secondary or tertiary...
• 11M.1.sl.TZ1.26: Which of the following statements about alkenes is not correct? A.     They have reactive double...
• 11M.2.sl.TZ1.6c: Below is a schematic diagram representing some reactions of ethene. The letters A–D represent the...
• 11M.2.sl.TZ1.6f: Explain, using equations, the following steps in the free-radical mechanism of the reaction of...
• 11M.2.sl.TZ1.6d: Describe a chemical test that could be used to distinguish between pent-1-ene and pentane.
• 11M.1.hl.TZ2.38: Which reactants could be used to form the compound below? A.     Butanoic acid and...
• 11M.2.hl.TZ2.7d.v: Explain why it is necessary to carry out the reaction under acidic conditions.
• 11M.2.hl.TZ2.7d.i: Describe the colour change that will be observed in the reaction.
• 11M.2.hl.TZ2.7d.iv: Deduce the half-equation for the oxidation of ethanol to ethanal and hence the overall redox...
• 11M.2.hl.TZ2.7d.vi: Identify the organic product formed if excess potassium dichromate is used and the reaction is...
• 11M.2.hl.TZ2.8b.v: The product \({{\text{C}}_{\text{5}}}{{\text{H}}_{{\text{11}}}}{\text{OH}}\) formed from the...
• 11M.1.sl.TZ2.28: What product is formed when...
• 11M.2.sl.TZ2.7b.ii: Both propan-1-ol and propan-2-ol can be oxidized in aqueous solution by potassium dichromate(VI)....
• 11M.2.sl.TZ2.7b.i: State the equation for the complete combustion of...
• 11M.2.sl.TZ2.7b.iii: State the name(s) and structure(s) of the organic product(s) that can be formed when each of the...
• 11M.2.sl.TZ2.6b.i: State the conditions necessary for the hydrogenation reaction to occur.
• 11M.2.sl.TZ2.6c.i: Describe a chemical test that could be used to distinguish between propane and propene. In each...
• 11M.2.sl.TZ2.6c.ii: Under certain conditions propene can polymerize to form poly(propene). State the type of...
• 11M.2.sl.TZ2.6c.iii: Other than polymerization, state one reaction of alkenes which is of economic importance.
• 12M.2.hl.TZ2.10a.i: State the names of two organic compounds required to produce ethyl methanoate and state suitable...
• 12M.2.hl.TZ2.10b.iii: State and explain how the rate of step II would differ if 2-chlorobutane was used instead of...
• 12M.2.sl.TZ2.5a: (i)     Distinguish between the terms empirical formula and molecular formula. Empirical...
• 12M.2.sl.TZ2.7b: (i)     Explain why alkanes have low reactivity. (ii)     Outline the meaning of the term...
• 12M.2.sl.TZ2.7c: (i)     Identify a suitable catalyst for this reaction. (ii)     But-2-ene can be converted to...
• 12M.3.sl.TZ2.F2b: Describe how an oil can be converted into a fat.
• 11N.1.hl.TZ0.34: Which compound is produced in the reaction between but-2-ene and steam? A.    ...
• 11N.1.hl.TZ0.36: Which compound is the major product of the reaction when 1-bromobutane is heated with...
• 11N.1.sl.TZ0.28: From which monomer is this polymer made?
• 11N.1.sl.TZ0.25: Which equation represents the initiation reaction when methane reacts with chlorine in the...
• 11N.1.sl.TZ0.29: What is the organic product of the reaction between 2-chlorobutane and sodium hydroxide...
• 11N.2.sl.TZ0.4b: Deduce the balanced chemical equation for the complete combustion of butan-1-ol.