1) In a molecule of ethene, C2H4, how many π (pi) bonds are present? a) One b) Two c) Three d) Four 2) A hazard that is particularly associated with alkanes is that they are a) corrosive b) flammable c) toxic by inhalation d) toxic by skin absorption 3) The carbon-carbon bond in ethene consists of a) two σ bonds b) one π bond c) one σ bond and one π bond d) two π bonds 4) Which of these statements about carbon-carbon double bonds is false? a) The two ends of a molecule cannot rotate relative to each other, about the axis of the double bond b) They are twice as strong as a carbon-carbon single bond c) They have a higher electron density than a single bond d) They consist of a sigma bond and a pi bond 5) The terms hazard and risk are used when considering the use of chemical compounds. For a particular characteristic of a pure compound, a) hazard is fixed but risk varies b) hazard varies but risk is fixed c) hazard and risk are fixed d) hazard and risk vary 6) Which of the following pairs are cis-trans isomers? a) 1 and 2 b) 1 and 4 c) 2 and 3 d) 3 and 4 7) Depending on the naming system used, the following compound is a) cis-1,2-dichloroethene or E-1,2-dichloroethene b) cis-1,2-dichloroethene or Z-1,2-dichloroethene. c) trans-1,2-dichloroethene or E-1,2-dichloroethene. d) trans-1,2-dichloroethene or Z-1,2-dichloroethene. 8) Which of the following shows geometric isomerism? a) prop-1-ene b) but-1-ene c) 1,1-dichloroethene d) 1,2-dichloroethene 9) What is the systematic name of the following? a) 3-methyl-2-propylpentane b) 3-methyl-4-propylpentane c) 3,4-dimethylheptane d) 4,5-dimethylheptane 10) Which of the following molecules does not contain a double bond? a) CO2 b) C2Cl4 c) C3F8 d) C2H2Cl2 11) Which of the following compounds will show geometric isomerism? a) A b) B c) C d) D 12) Name the alkene shown below a) Z-4-ethylhex-4-ene b) E-3-ethylhex-2-ene c) Z-3-ethylhex-2-ene d) E-3-propylpent-2-ene 13) Which of the following alkenes exhibits E-Z isomerism? a) H3CCH=C(CH3)2 b) (CH3)2C=CH2 c) H2C=CHCH2CH3 d) H3CCH=CHCH3 14) Which of the following statements is true? a) Ethene acts as a nucleophile because it is polar. b) Ethene acts as a nucleophile because it can donate a pair of electrons to bromine. c) Ethene is not a nucleophile in this reaction. d) Ethene acts as a nucleophile because it donates a single electron to bromine. 15) Which is the first step in the mechanism for the reaction between hydrogen bromide and ethene? a) b) c) d) 16) Which is a step in the mechanism during the reaction between ethene and hydrogen bromide? a) b) c) d) 17) The mechanism of the reaction between ethene and hydrogen bromide is a) electrophilic addition b) electrophilic substitution c) nucleophilic addition d) nucleophilic substitution 18) An electrophile is defined as a species that a) is an electron pair acceptor b) is an electron pair donor c) has a negative charge d) has a positive charge 19) A compound Z contains, by mass, 26.7% carbon, 2.2% hydrogen, and 71.1% oxygen. The empirical formula of Z is a) CHO2  b) C2H2O4 c) CHO d) C2H2O2 20) The equation for the reaction between ethane and chlorine in the presence of UV radiation is a) C2H6 + Cl2 → C2H5Cl + HCl b) C2H6 + Cl2 → C2H4Cl2 + H2 c) C2H6 + Cl2→ 2CH3Cl d) C2H4 + Cl2 → C2H4Cl2 21) The role of the UV radiation in the reaction between ethane and chlorine is to a) break the Cl—Cl bond forming Cl• free radicals b) break the Cl—Cl bond forming Cl+ and Cl− ions c) break the C—C bond in ethane forming CH3• free radicals d) break a C—H bond in ethane forming C2H5• free radicals 22) The overall reaction between ethane and chlorine in the presence of UV radiation is best described as a) addition b) homolytic fission c) heterolytic fission d) substitution 23) When methane reacts with chlorine, a mixture of products forms. Which product provides the strongest evidence for a free radical mechanism? a) C2H6 b) CH3Cl c) HCl d) CHCl3 24) The reaction of methane with bromine in sunlight is best described as  a) electrophilic addition b) electrophilic substitution c) free radical addition d) free radical substitution 25) •CH3 + Br• → CH3Br, This step in the mechanism of the reaction of methane with bromine in sunlight is known as a) initiation b) propagation c) termination d) reduction 26) The reaction of methane with bromine in sunlight produces a mixture of products. Which of the following is most likely to form, as well as bromomethane? a) ethane b) propane c) butane d) pentane 27) When human skin is overexposed to sunlight, it is likely to lead to skin cancer. What is the radiation in sunlight that leads to skin cancer? a) microwaves b) infrared c) visible light d) ultraviolet 28) Which of the following compounds shows geometric (E-Z or cis-trans) isomerism? a) but-1-ene b) 2-methylbut-1-ene c) but-2-ene d) 2-methylbut-2-ene 29) What is the systematic name for the compound with the following formula? a) 2-methyl-4-ethylpentane b) 2-ethyl-4-methylpentane c) 2,4-dimethylhexane d) 3,5-dimethylhexane 30) Which of the following molecules is formed on adding bromine water to ethene? a) ethanol b) ethane-1,2-diol c) bromoethane d) 2-bromoethanol 31) Which molecule does not exhibit E/Z isomerism? a) b) c) d) 32) A section of a polymer is shown opposite. What is the monomer for this polymer? a) b) c) d) 33) This question is about the organic compounds with skeletal formulae as shown. Which compounds are isomers? a) 1 and 2 b) 1 and 3 c) 1 and 4 d) 2 and 3 34) This question is about the organic compounds with skeletal formulae as shown. Which compound has the same molecular formula and empirical formula? a) 1 b) 2 c) 3 d) 4 35) Isomers have different a) empirical formulae b) molecular formulae c) skeletal formulae d) molar masses 36) How many isomers are there of C5H12? a) Two b) Three c) Four d) Five 37) How many compounds have the formula C5H12? a) 1 b) 2 c) 3 d) 4 38) The correct name for the compound shown below is a) 2-methylbut-3-ene b) 3-methylbut-2-ene c) 3-methylbut-3-ene d) 2-methylbut-2-ene 39) The equations below show some of the processes that occur when methane and chlorine react. Which equation shows a propagation step? a) A b) B c) C d) D 40) The equations below show some of the processes that occur when methane and chlorine react. Which equation shows an initiation step? a) A b) B c) C d) D 41) The equations below show some of the processes that occur when methane and chlorine react. Which equation shows a termination step? a) A b) B c) C d) D 42) The mechanism of the reaction represented by the following equation is an example of a) Free radical substitution b) Free radical addition c) Electrophilic substitution d) Electrophilic addition 43) What is the systematic name for the following compound? a) Z-4-methylhex-2-ene b) E-2-ethylpent-3-ene c) Z-4-ethylpent-2-ene d) E-4-methylhex-2-ene 44) What is the systematic name for the compound with the following formula? a) 2-methyl-3-ethylbutane b) 1,2,3-trimethylbutane c) 2,3-dimethylpropane d) 2,3-dimethylpentane 45) The repeat unit of a polymer is shown below. The systematic name of the alkene monomer that forms this polymer is a) 2-methyl-3-ethylpropene b) 2-methylpent-2-ene c) 2-methylpent-3-ene d) 4-methylpent-2-ene 46) What is the systematic name for the hydrocarbon shown below? a) 1,4-dimethylbutane b) 2,3-dimethylbutane c) 2,3-dimethylhexane d) 1,1,2,2-tetramethylethane 47) The reaction of hydrogen bromide with propene requires a) normal laboratory conditions b) the presence of UV light c) the presence of a suitable catalyst d) heating under reflux 48) The reaction of hydrogen bromide with propene is best described as a) nucleophilic substitution b) electrophilic substitution c) nucleophilic addition d) electrophilic addition 49) The major product of the reaction of hydrogen bromide with propene will be a) 1-bromopropane b) 2-bromopropane c) C 1,2-dibromopropane d) 2-bromopropene 50) If propene, CH3CH=CH2, is reacted with aqueous acidified potassium manganate(VII) the organic product is a) CH3CH(OH)CH2OH b) CH3CH(OH)CH3 c) HOCH2CH2CH2OH d) CH3CH2CH2OH 51) Propene reacts with hydrogen chloride gas to give mainly a) 1-chloropropane (CH3CH2CH2Cl) b) 2-chloropropane (CH3CHClCH3) c) 3-chloroprop-1-ene (CH2=CHCH2Cl) d) 1,2-dichloropropane (CH3CHClCH2Cl) 52) Which of the compounds below are isomers are a) W and X b) W and Y c) W and Z d) X and Z 53) Which of the compounds below can react with chlorine to form C6H12Cl2 as the only product? a) Compound W b) Compound X c) Compound Y d) Compound Z 54) Which of the compounds below is reformed in the oil industry, producing one mole of a compound with formula C6H6 and four moles of hydrogen, H2, only? a) Compound W b) Compound X c) Compound Y d) Compound Z 55) Nickel is often used as the catalyst for Reaction 1. Use PT to select which other metal can be used instead. a) Potassium b) Calcium c) Gallium d) Palladium 56) What is formed in Reaction 3? a) Only 1-bromopropane b) Only 2-bromopropane c) A mixture of bromopropanes containing mainly 2-bromopropane d) A mixture of bromopropanes containing mainly 1-bromopropane 57) Dilute sulfuric acid and which of the following reagents is needed for Reaction 4? a) KOH b) KMnO4 c) H2O2 d) O2 58) The reaction of propene in Reaction 4 can be classified both as a) addition and reduction b) addition and oxidation c) free radical substitution and reduction d) free radical substitution and oxidation 59) Many organic compounds have toxic vapours. For this reason a) a naked flame should never be used when carrying out experiments with organic compounds b) gloves should usually be worn when carrying out experiments with organic compounds c) a fume cupboard should be used wherever possible when carrying out experiments with organic compounds d) most experiments with organic compounds are banned in schools and colleges 60) Which compound is 2-methylpropane? a) A b) B c) C d) D 61) Which compound has the molecular formula C5H12? a) A b) B c) C d) D 62) Which compounds are isomers? a) compound A and compound C b) compound B and compound C c) compound B and compound D d) compound C and compound D 63) Which compound reacts with acidified potassium manganate(VII) to form a diol? a) A b) B c) C d) D 64) The structural formula of 5-chloro-2,2-dimethylhexane is a) b) c) d) 65) How many structural isomers does the alkane C5H12 have? a) 4 b) 3 c) 2 d) 1 66) What is the correct name for the compound below? a) E-2,3-dibromopent-2-ene b) E-2,3-dibromopent-3-ene c) Z-2,3-dibromopent-3-ene d) Z-2,3-dibromopent-2-ene 67) Give the systematic name for this hydrocarbon a) 1,1,4-triethylpentane b) 2,5,5-triethylpentane c) 2,5-diethylheptane d) 3-ethyl-6-methyloctane 68) What is the IUPAC name of the compound shown below? a) 2-ethyl-2-propylpentane b) 3-methyl-3-propylhexane c) 4-methyl-4-propylhexane d) 4-ethyl-4-methylheptane

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