Hydrocarbons MCQs – 1

1) Which of the following is an addition (chain growth) polymer?

1. Nylon – 66

a) p-nitrophenol
b) o-nitrophenol
c) m-nitrophenol
d) phenols

2) The number of carbon atoms present in the hydrocarbon eicosane
a) 10
b) 20
c) 15
d) 8

3) The hybridisation of the central carbon on an allene is
a) sp
b) sp2
c) sp3
d) sp3d

4) The type of overlapping involved in ethyne molecule
a) sp- sp
b) p-p
c) sp-s
d) All the above

5) The number of sigma and pi bonds in benzene is
a) 3,6
b) 3,9
c) 12,3
d) 3,12

6) The isomer of pentane which can give only one mono substitution product is
a) 2,2-dimethyl propane
b) 2-methyl butane
c) 3-methyl butane
d) pentane

7) n – heptane to toluene, the catalyst used is
a) cobalt
b) nickel
c) platinum
d) V2O5

8) The IUPAC name of methyl methacrylate is
a) methyl methanoate
b) meth-2-methyl-1-prop-2-enoate
c) meth-2-methyl propanoate
d) ethyl-2-ethyl propenoate

9) In the reaction,      x is

10) Which of the following compound gives the same products obeying Markovnikovs rule and the peroxide effect ?

11) Benzene reacts with CH3COCI + anhyd. AlCl 3 to give
a) Chlorobenzene
b) Toluene
c) Benzyl chloride
d) Acetophenone.

12) Acetylene reacts with two molecules of HBr to give

13) Lindlars catalyst is
a) Na in alcohol
b) Raney nickel
c) /PbO

14) When propene is reacted with HBr in the presence of peroxides, the product is
a) 2-Bromopropane
b) 1-Bromopropane
c) 3-Bromopropane
d) None of the above.

15) When excess of CH3COOH is reacted with CH s CH in presence of Hg2+, the product is
d) None of these.

16) Aromatic hydrocarbons undergo
a) Nucleophilic addition reactions
b) Electrophilic addition reactions
c) Electrophilic substitution reactions
d) None of these.

17) Ethyne can be oxidised to oxalic acid by using
a) Chromic acid
c) Hypochlorous acid
d) All reagents.

18) Which one of the following compounds would have the highest heat of hydrogenation ?

19) The conversion of CH4 to CH3CI is an example of …… reaction
a) Electrophilic substitution
b) Nucleophilic substitution
c) Free radical substitution
d) Free radical addition.

20) In benzene all the C—C bonds have the same length because of
a) Chain isomerism
b) Isomerism
c) Hybridization
d) Resonance.

21) The products obtained via oxymercuration (HgSO4 + H2SO4) of 1-butyne would be

22) An alkyne has the general formula

23) In its reaction with silver nitrate, acetylene shows its
a) oxidising property
b) reducing property
c) basic property
d) acidic property.

24) In Friedel-Crafts alkylation, besides AICI3, the other reactants are

25) Propyne on polymerization gives
a) Mesitylene
b) Benzene
c) Ethylbenzene
d) Propylbenzene.

26) Which of the following has the highest boiling point ?
a) n-Pentane
b) Ethane
c) n-Octane
d) n-Butane.

27) KMnO4 will oxidise acetylene to
a) Ethylene glycol
b) Ethyl alcohol
c) Oxalic acid
d) Acetic acid.

28) Baeyers reagent is used in the laboratory for the
a) detection of the double bond
b) reduction process
c) oxidation process
d) detection of glucose.

29) The alkene C6H10 producing OHC(CH2)4CHO on ozonolysis is
a) Hexene-1
b) Hexene-3
c) Cyclohexene
d) 1-Methylcyclohexene-1.

30) Ozonolysis of 1, 3-butadiene and hydrolysis under reducing conditions gives
a) Mixture of an aldehyde and a ketone
b) Mixture of an aldehyde and an acid
c) Only aldehydes
d) Only ketones.

31) Propyne and propene can be distinguished by

32) Which of the following is most reactive in electrophilic substitution ?

33) When 2-butyne is treated with dil. H2SO4/HgSO4, the product formed is
a) Butanol-1
b) Butanone
c) 2-Butanol
d) Butanoic acid.

34) A compound with the molecular formula has all the four carbon atoms and the oxygen atom in the ring. It also has two double bonds. The compound is
a) Homocyclic and aromatic
b) Heterocyclic and aromatic
c) Homocyclic but not aromatic
d) Heterocyclic but not aromatic

35) Two members of a homologous series have
a) Different general formula
b) Different molecular weights
c) Identical physical constants
d) Different functional groups

36) Chemically similar compounds having the same functional group but differing by a group in their molecular formulae are known as
a) Isomers
b) Homologues
c) Allotropes
d) Polymers

37) Which of the following statement is incorrect ? The members of the homologous series of alkanes
a) are all straight chain compounds
c) have similar chemical properties
d) show a regular gradation of physical properties

38) Which of the following forms a homologous series ?
a) Ethane, ethylene, acetylene
b) Ethane, propane, butanone
c) Methanal, ethanol, propanoic acid
d) Butane, 2-methylbutane, 2, 3-dimethyl-butane

39) The IUPAC name for the isobutyl group is
a) 2-Methylethyl
b) 1,1-Dimethylethyl
c) 2-Methylpropyl
d) 1-Methylpropyl

40) An organic compound contains – C C -, – OH, > C = O and -CH=O groups. Which of these will be considered to be the principal functional group while giving its IUPAC name ?
b) -OH
c) > C = O
d) -CH = O

41) The correct IUPAC name of CH3CH2CH(CH3)CH(C2H5)2 is
a) 4-Ethyl-3-methylhexane
b) 3-Ethyl-4-methylhexane
c) 4-Methyl-3-ethylhexane
d) 2,4-Diethylpentane

42) The IUPAC name of the compound is
a) 3, 3-Diethyl-4-methyl-5-(1-methylethyl) octane
b) 3, 3-Diethyl-4-methyl-5-isopropyloctane
c) 6, 6-Diethyl-5-methyl-4 (1-methylethyl) octane
d) 6, 6-Diethyl-4-isopropyl-5-methyloctane

43) The IUPAC name of the saturated hydrocarbon having the following carbon skeleton is

a) 5-Propyl-2, 3, 4-trimethylheptane
b) 5-Ethyl-2, 3, 4-trimethyloctane
c) 4-Ethyl-5, 6, 7-trimethyloctane
d) 3-Propyl-4, 5, 6-trimethylheptane

44) The IUPAC name of an alkane containing only one methyl, one ethyl and one n-propyl group is
a) 2, 3-Dimethylpentane
b) 3-Methylhexane
c) 2, 3-Dimethylbutane
d) 3-Ethyl-4-methylheptane

45) The lowest molecular weight alkane which has ethyl group as the substituent has the IUPAC name
a) 2-Ethylpropane
b) 2-Ethylbutane
c) 2-Ethylpentane
d) 3-Ethylpentane

46) The IUPAC name of the compound with the structural formula CH3 – CH = CH – C CH is
a) Pent-2-en-4-yne
b) Pent-1-yn-3-ene
c) Pent-3-en-1-yne
d) Pent-2-en-5-yne

47) The IUPAC name of the compound, is
a) 2-Ethylprop-2-en-1-ol
b) 2-Hydroxymethylbutan-1-ol
c) 2-Methylenebutan-1-ol
d) 2-Ethyl-3-hydroxyprop-1-ene

48) The IUPAC name of the compound,

a) 2-lsopropyl-3-methyl-1 -phenyl-3-butanol
b) 3-lsopropyl-2-methyl-4-phenyl-2-butanol
c) 3-Benzyl-2, 4-dimethyl-4-pentanol
d) 3-Benzyl-2, 4-dimethyl-2-pentanol

49) The correct IUPAC name of the compound is
a) N-Formylaminoethane
b) N-Ethylformylamine
c) N-Ethylmethanamide
d) Ethylaminomethanal

50) The IUPAC name of the compound, is
a) 3-(N, N-Dimethylamino)-3-methylpentane
b) 3-Methyl-3-N, N-dimethyl-3-pentanamine
c) 3, N, N-Trimethyl-3-pentanamine
d) 2-Ethyl-2-(N, N-dimethylamino) butane

51) The compound, may be named
a) 2-Ethyl-2-methyloxirane
b) 2-methyl butane oxide
c) 1,2-Oxapentane
d) Isopentene epoxide

52) The IUPAC name of urea is
a) Diaminoketone
b) 1-Aminomethanamide
c) 1-Aminoethanamide
d) Aminoacetamide

53) The IUPAC name for the compound is
a) 1 , 2-Epoxy-3-propanol
b) 1 , 2-Oxa-3-propanol
c) 2, 3-Epoxy-1 -propanol
d) 2, 3-Epoxyallyl alcohol

54) The correct IUPAC name of is
a) 2-Carboxypropane-1 , 3-dioic acid
b) 2-Carboxymalonic acid
c) 1,1,1-Tricarboxy methane
d) Propane-1, 2, 3-tricarboxylic acid

55) The IUPAC name of the compound is
a) Isobutanetrinitrile
b) 3-Cyanomethylpentane-1,3-dinitrile
c) 2, 2-Bis(cyanomethyl)ethanenitrile
d) Triethanenitrilemethane

56) The IUPAC name of the compound is
a) Hexylcyclopentane
b) 1-Cyc!opentylhexane
c) Pentylcyclohexane
d) 1-Cyclohexylpentane

57) The IUPAC name of is
a) Cumene
b) 2-Phenylpropane
c) Phenylisopropane
d) 1-(2-Propy I) benzene

58) The IUPAC name of the compound is
a) 4-Methylcyclopent-1-en-2-ol
b) 5-Methylcyclopent-2-en-1-ol
c) 2-Methylcyclopent-4-en-1-ol
d) 3-Methylcyclopent-1-en-2-ol.

59) The IUPAC name for the compound OH is
a) Bicyclo[2,4,0]octan-3-ol
b) Bicyclo[4,2,0]octan-3-ol
c) Bicyclo[2,2,2]octan-3-ol
d) Bicyclo [4,2,0] octan-6-ol

60) The compound, may be named
a) 2-Carbethoxy-1 -carboxyprop-1 -ene
b) 2-Carbethoxy but -2- enoic acid
c) 2-Ethoxycarborylbut -2- enoic acid
d) 3-Ethoxycanborylebut -2- enoic acid

61) The correct IUPAC name of the compound is
a) 5-Carboxy-3-oxocyclohexanecarboxalad —ehyde
b) 2-Carboxy-5-formylcyclohexane
c) 4-Formyl-2-oxocyclohexanecarboxylic acid
d) 4-Carboxy-3-oxocyclohexanal

62) What is the correct IUPAC name for the following compound ?
a) 3, 4-Dimethyl-3-n-propylonane
b) 6, 7-Dimethyl-2-n-propylnonane
c) 6, 7-Dimethyl-7-ethyldecane
d) 4-Ethyl-4, 5-dimethyldecane

63) The IUPAC name of the following compound is
a) 2-Methylpentane
b) 4-Methylpentene-1
c) 1-Hexene
d) 3-Methylpentene

64) The compound
a) 1 -Ethyl-2-butane
b) 3-Methyl-3-pentene
c) 3-Methyl-2-pentene
d) 3-Ethyl-2-butene

65) The IUPAC name of the compound is
a) 1, 2, 3-Tricyanopropane
b) 3-Cyanopentane-1, 5-dinitrile
c) Propane-1, 2, 3-tricarbonitrile
d) Propane-1, 2, 3-tricarbylamine

66) The IUPAC name of the following compound
a) 1-(2-Butyl)cyclohexane
b) 1-(3-Butyl)cyclohexane
c) 2-Cyclohexylbutane
d) 3-Cyclohexylbutane

67) The IUPAC name of the compound, CH3-CH(C2H5) – CH2-CH(OH)-CH3 is
a) 4-Ethylpentanol-2
b) 4-Methylhexanol-2
c) 2-Ethylpentanol-2
d) 3-Methylhexanol-2

68) The IUPAC name of the compound, CH2 = CH – CH(CH3)2 is
a) 1,1-Dimethyl-2-propene
b) 3-Methyl-1-butene
c) 2-Vinylpropane
d) 1 -Isopropylethylene

69) The structure of 4-methylpentene-2 is

70) The compound which has one isopropyl group is
a) 2, 2, 3, 3-Tetramethylpentane
b) 2, 2-Dimethylpentane
c) 2, 2, 3-Trimethylpentane
d) 2-Methylpentane

71) The IUPAC name of the compound,
a) 3-Methylpentanoyl chloride
b) 3-Methylbutanoyl chloride
c) 1-Chloro-3-ethylbutanone
d) 1-Chloro-3-methylpentanone

72) The correct IUPAC name of the compound,
a) 5, 6-Diethyl-8-methyldec-6-ene
b) 6-Butyl-5-ethyl-3-methyloct-4-ene
c) 5, 6-Diethyl-3-methyldec-4-ene
d) 2, 4, 5-Triethylnon-3-ene

73) The IUPAC name of (C2H5)2CHCH2OH is
a) 2-Ethylbutanol-1
b) 2-Methylpentanol-1
c) 2-Ethylpentanol-1
d) 3-Ethylbutanol-1

74) An organic compound X (molecular formula C6H7O2N) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent. X is
a) Homocyclic but not aromatic
b) Aromatic but not homocyclic
c) Homocyclic and aromatic
d) Heterocyclic and aromatic

75) 2-Methyl-2-butene will be represented as

76) The IUPAC name of the compound is
a) 4-Hydroxy-1-methylpentanal
b) 4-Hydroxy-2-methylpent-2-en-1 -al
c) 2-Hydroxy-4-methylpent-3-en-5-al
d) 2-Hydroxy-3-methylpent-2-en-5-al

77) The IUPAC name for the compound, is
a) 2-Ethyl-3-methylbut-1-ene
b) 2-lsopropylbut-1-ene
c) 2-Methyl-3-ethyl-3-butene
d) 2-(1 -Methylethyl)but-1 -ene

78) Choose the correct IUPAC name for
a) Butan-2-aldehyde
b) 2-Methylbutanal
c) 3-Methylisobutyraldehyde
d) 2-Ethylpropanal

79) The IUPAC name of CH3 – C C – CH(CH3)2 is
a) 4-Methyl-2-pentyne
c) Isopropylmethylacetylene
d) 2-Methyl-4-pentyne

80) @The kind of valency that exists in CaH2 and C2H2 is
b) Electrovalency in both
d) Covalency in both

81) Which of the following IUPAC names is correct ?
a) 2-Methyl-3-ethylpentane
b) 3-Ethyl-2-methylpentane
c) 2-Ethyl-3-methylpentane
d) 3-Methyl-2-ethylpentane

82) The IUPAC name of the compound is
a) 5-Vinyloct-3-en-1-al
b) 4-Butyl-2, 5-hexadien-1 -al
c) 5-Vinyloct-5-en-8-al
d) 3-Butyl-1, 4-hexadien-8-al

83) The systematic name of (CH3)2CH-COOH is
a) 2-Propanoic acid
b) Isobutanoic acid
c) 2-Methylpropanoic acid
d) 2-Methylbutanoic acid

84) The IUPAC name of the compound, is
a) 5-Amino-2-heptenoic acid
c) 5-Aminohex-2-enecarboxylic acid
d) 3-Amino-5-heptenoic acid

85) Which of the following represents the correct IUPAC name of the compound CH2 = CH – CH2CI ?
a) Propenyl chloride
b) 1-Chloro-3-propene
c) 3-Chloro-1-propene
d) Vinyl chloride

86) The structural formula of cyclohexyl alcohol is
d) None of these

87) The IUPAC name of this compound is
a) 2-lsopropyl pentane
b) 2, 3-Dimethylhexane
c) Isononane
d) 2, 4-Dimethylhexane

88) The IUPAC name of is
a) 1-Hydroxy-4-methyl-3-pentanone
b) 2-Methyl-5-hydroxy-3-pentanone
c) 4-Methyl-3-oxo-1-pentanol
d) Hexanol-1 -one-3

89) The IUPAC name of
a) 2, 5, 6-Trimethylhexane
b) 2, 3, 6-Trimethylheptane
c) 2, 3, 6-Trimethylhexane
d) 2, 5, 6-Trimethylheptane

90) Which of the following statements is false for isopentane ?
c) It has one CH group
d) It has a carbon which is not bonded to hydrogen

91) The IUPAC name of is
a) 2, 4-Dimethylpentanol-2
b) 2, 4-Dimethylpentanol-4
c) 2, 2-Dimethylbutanol-2
d) 1,1,3-Trimethylbutanol -1

92) The IUPAC name of (CH3)2CH – CH2 – CH2Br
a) 1-Bromopentane
b) 2-Methyl-4-bromobutane
c) 1-Bromo-3-methyIbutane
d) 2-Methyl-3-bromopropane

93) The IUPAC name of the compound is
a) 1 , 1 -Dimethylbutane-1 , 3-diol
b) 1 , 3, 3-Trimethylpropane-1 , 3-diol
c) 2-Methylpentane-2, 4-diol
d) 1 , 3, 3-Trimethyl-1 , 3-propanediol

94) The IUPAC name of the compound is
a) 4-Methyl-3-hexanol
b) Heptanol
c) 4-Methyl-2-hexanol
d) None of these

95) The IUPAC name for the compound is
a) trans-2-Chloro-3-iodopentene-2
b) cis-2-Chloro-3-iodo-2-pentene
c) trans-3-lodo-4-chloro-3-pentene
d) cis-3-lodo-4-chloro-3-pentene

96) The compound, is known by which of the following names ?
a) Bicyclo[2,2,2]octane
b) Bicyclo[2,2,1]octane
c) Bicyclo[1,2,1] octane
d) Bicyclo[1,1,1]octane

97) The correct IUPAC name of the compound with molecular formula, (CH3)3C – CH3 is
a) Pentane
b) 1,1,1-Trimethylethane
c) 2, 2-Dimethylpropane
d) Neopentane

98) The IUPAC name of is
a) 6-Chloro-4-ethyl-5-methylhept-5-en-1 -yne
b) 6-Chloro-4-ethyl-5-methylhept-1 -yn-5-ene
c) 2-Chloro-4-ethyl-3-methylhept-2-en-6-yne
d) 2-Chloro-4-ethyl-3-methylhept-6-yn-2-ene

99) The IUPAC name of the compound having the molecular formula CI3C – CH2CHO is
a) 3, 3, 3-Trichloropropanal
b) 1,1,1 -Trichloropropanal
c) 2, 2, 2-Trichloropropanal
d) Chloral

100) The IUPAC name of the compound is
a) 5-Oxo-4-hydroxy-2-pentanone
b) 4-Hydroxy-5-al-2-pentanone
c) 2-Hydroxy-4-oxopentanal
d) 1 -AI-4-oxo-2-pentanol


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