MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

Please refer to MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Chemistry issued for the current academic year. We have provided MCQ Questions for Class 11 Chemistry for all chapters on our website. Students should learn the objective based questions for Chapter 13 Hydrocarbons in Class 11 Chemistry provided below to get more marks in exams.

Chapter 13 Hydrocarbons MCQ Questions

Please refer to the following Chapter 13 Hydrocarbons MCQ Questions Class 11 Chemistry with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 13 Hydrocarbons Class 11 Chemistry

Question. Among P , Q, Rand S, the aromatic compound (s) is/are

(a) P
(b) Q
(c) R
(d) S       

Question. To get DDT chlorobenzene has to react will following compound in the presence of concentrated sulphuric acid
(a) trichloro ethane
(b) dichloro acetone
(c) dichloro acetaldehyde
(d) trichloro acetaldehyde       

Question. Three fused benzene rings are found in 
(a) naphthalene
(b) anthracene
(c) phenanthroline
(d) triphenyl methane
(e) None of the above        

Question. In the oxidation of C₆H₅—CH₂—CH₃ by KMnO₄ the product formed is
(a) C₆H₅—CH₂—CHO
(b) C₆H₅—CH₂—COOH
(c) C₆H₅—COOH
(d) C₆H₅—CH₂—OH     

Question. The electrophile in the nitration of benzene is
(a) No⁺₂
(b) NO₂
(c) NO⁺
(d) NO^–₂       

Question. Which of the following molecules, in pure form is (are) unstable at room temperature ?   

Question. The non-aromatic compound among the following is 

Question. Lindane can be obtained by the reaction of benzene with
(a) CH₃Cl/ anhydrous AICl₃
(b) C₂H₅I /anhydrous AICl₃
(c) CH₃COCI/ anhydrous AICl₃
(d) Cl₂ in sun light      

Question. Which of the following molecules/species are aromatic 

Question. Which will react with NaBH₄ ? 
(a) Benzoic acid
(b) Benzamide
(c) Cyclohexanone
(d) Acetic acid       

Question. Suitable reagents A and B for the following reactions are

(a) Br, Br₂
(b) Br₂ , NBS
(c) NBS, NBS
(d) NBS,

Question.
On reductive ozonolysis yields 
(a) 6-oxoheptanal
(b) 6-oxoheptanoic acid
(c) 6-hydroxyheptanaI
(d) 3-hydroxypentanal       

Question. Cyclohexene on reaction with OsO₄ followed by reaction with NaHSO₃ gives 
(a) cis-diol
(b) trans-diol
(c) epoxy
(d) alcohol   

Question. What will be the octane number of best fuel?
(a) 80
(b) 81
(c) 74
(d) 65       

Question. Petrol for aviation purpose must contain
(a) straight chain hydrocarbons
(b) aromatic hydrocarbons
(c) olefinic hydrocarbons
(d) highly branched chain paraffins   

Question. TEL is a compound used as 
(a) antibiotic
(b) antiseptic
(c) anti.knocking
(d) antioxidant     

Question. Petrochemicals can be used to prepare
(a) synthetic fibres
(b) pesticides
(c) plastics
(d) All of these     

Question. Gasoline with an octane number of 80 is equivalent in knocking characteristics to a mixture of heptane and iso-octane of the following composition 
(a) 20% heptane + 80% iso-octane
(b) 90% heptane + 10% iso-octane
(c) 80% heptane + 20% iso-octane
(d) 10% heptane + 90% iso-octane     

Question. Synthetic petrol is prepared by 
(a) Wurtz reaction
(b) by distillation
(c) Fischer-Tropsch process
(d) None of the above       

Question. Identify C in the following   

(a) ethanol
(b) propanone
(c) cumene hydroperoxide
(d) water     

Question. What are the shapes of ethyne and methane? 
(a) Square planar and linear
(b) Tetrahedral and trigonal planar
(c) Linear and tetrahedral
(d) Trigonal planar and linear     

Question. Which of the following is a conjugated diene?
(a) CH₃CH=C=CHCH₃
(b) CH₂= CHCH₂CH= CH₂
(c) CH₂= CHCH₂CH₂CH= CH₂
(d) CH2= C—CH= CH₂ICH₃
               l
              CH₃         

Question. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of
(a) two ethylenic double bonds  
(b) a vinyl group
(c) an iso-propyl group
(d) an acetylenic triple bond     

Question. Ozonolysis of an organic compound A produces acetone and propionaldehyde in equimolar mixture. Identify A from the following compounds. 
(a) 2 -methyl-1-pentene
(b) 1-pentene
(c) 2-pentene
(d) 2 -methyl-2-pentene         

Question. In the following reaction, A and B, respectively are
A → C₂H₅Br → A 
(a) C₂ H₄ , ale. KOH / Δ
(b) C₂H₅Cl,aq. KOH / Δ
(c) CH₃O H,aq. KOH / Δ
(d) C₂H₂ , PBr₃     

Question. The conversion of propene to propanol is …. type of reaction. 
(a) hydrogenation
(c) hydrolysis
(b) hydration
(d) dehydrogenation     

Question. A gas decolourised by KMnO₄ solution but gives no precipitate with ammoniacal cuprous chloride is 
(a) ethane
(b) methane
(c) ethene
(d) acetylene     

Question. Which reacts with ammoniacal AgNO₃ ? 
(a) Propyne
(b) 2-butyne
(c) 1, 3-butadiene
(d) Pentene     

Question. Which is most aciclic of the following ?
(a) Methane
(b) Acetylene
(c) I -butene
(d) Neo-pentane     

Question. The1mal decomposition of

Question. An organic alkadiene on reductive ozonolysis produces
I. acetaldehyde
II. acetone
III. 2-methylpropane -1,3-dial The formula of alkadiene will be
(a) CH₃C= CH CHCH = CHCH₃
          l          l
         CH₃     CH₃
(b) CH₃CHCH = CCH = CHCH₃
           l            l
         CH₃       CH₃
(c) CH₃C = CHCHC = CHCH₃
            l            l
          CH₃       CH₃
(d) CH₃CH₂CHCH = CHC= CH₂
                 l            l
               CH₃       CH₃         

Question. Oxidation of 1-butene with hot KMnO₄ solution produces
(a) CH₃CH₂COOH + HCOOH 
(b) CH₃CH₂COOH +CO₂
(c) CH₃COOH + CO₂
(d) (CH₃)₂C=O + CO₂     

Question. An alkyne combines with a conjugated diene to give an unconjugated cycloalkadiene. The most likely title of this reaction is 
(a) Schotten-Baumann reaction
(b) Hofrnann-bromamide reaction
(c) Pinacol-Pinacolone rearrangement
(d) Deils-Alder reaction     

Question. A hydrocarbon of molecular formula C₆H₁₀ reacts with sodamide and the same on ozonolysis followed by hydrogen peroxide oxidation gives two molecules of carboxylic acids, one being optically active. Then, the hydrocarbon may be 
(a) 1-hexyne
(b) 3-hexyne
(c) 3-methyl-1-pentyne
(d) 3, 3-dimethyl-1-butyne     

Question. [A] →^Lindlar’s _catalyst CH₃ — C=C — CH₃ →^{Na in} _liq.NH3 [B]
[A] and [B] are respectively 
(a) cis, trans-2-butene
(b) both trans-2-butene
(c) trans, cis-2-butene
(d) both cis-2-butene   

Question. Acetylene does not react with 
(a) Na
(b) ammoniacal AgNO₃
(c) HCl
(d) NaOH       

Question. Identify Z in the series,
                _{HBr      aq. KOH    NaCO3}
CH₂ = CH₂  →  X     →    Y   →   Z
                              ^{I₂ excess}
(a) C₂H₅I
(b) C₂H₅OH
(c) CHI₃
(d) CH₃CHO       

Question. When 2-butyne is treated with Pd-BaSO₄ , the product formed will be 
(a) cis-2-butene
(b) trans-2-butene
(c) 1-butene
(d) 2-hydroxy butane     

Question. Hydrogen bonding plays a central role in the following phenomena 
(a) ice floats in water
(b) higher Lewis basicity of primary amines than tertiary amines in aqueous solutions
(c) formic acid is more acidic than acetic acid
(d) dimerisation of acetic acid in benzene   

Question. 1-butyne on hydration gives 
(a) butyne-1, 2-diol
(b) butane-1-ol
(c) butane-2-ol
(d) butane-2-one       

Question. Which of the following reactions 2, 2-dibromopropane ?
(a) CH₃—C= CH + 2HBr →
(b) CH₃CH = CHBr + HBr →
(c) CH=CH + 2HBr →
(d) CH₃ — CH= CH₂ + HBr →     

Question. In the sequence of reactions,
C2H₄ →^HBr X  → ^AgCN y →_H2/Ni^[H] Z,
compound Z is
(a) N-rnethyl ethanamine
(c) N, N-clirnethylarnine
(b) N-propylamine
(d) ethyl cyanide       

Question. A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline KMnO₄ . The gas is
(a) C₂H₆
(b) CH₄ 
(c) C₂H₂
(d) C₂H₄     

Question. The correct statement is 
(a) cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene
(b) One mole each of benzene and hydrogen when reacted give 1/3 mole of cyclohexane and 2/3 mole 3 3 unreacted hydrogen
(c) Hydrogenation of benzene to cyclohexane is an endothermic process
(d) It is easier to hydrogenate benzene when compared to cyclohexene  

Question. Which of the following will yield trans product from butyne?
(a) LiAlH₄
(b) Na/Liq.NH₃
(c) NaBH₄
(d) Ni catalyst       

Question. Which of the following is not aromatic 
(a) 1, 3-cyclobutadiene
(b) pyridine
(c) furan
(d) thiophene     

Question. n-C₇H₁₆ →^{V2O5, S00’C}_1020atm. A →CI₂ B What is B in the above reaction?
(a) Benzyl chloride
(b) Benzal chloride
(c) Hexachlorobenzene
(d) Benzene hexachloride     

Question. CH₃ —C= C—CH₃ →_{(ii) Zn/H2O}^{(i) X}
CH₃—C—C—CH₃ . In the above reaction X is
        ll   ll
        O  O
(a) HNO₃
(b) O₂
(c) O₃
(d) KMnO₄       

Question. Benzene on treatment with a mixture of cone. HNO₃ and cone. H₂SO₄ at 100°C gives 
(a) nitrobenzene
(b) m-dinitrobenzene
(c) p-dinitrobenzene
(d) o-dinitrobenzene     

Question. Reaction ofHBr with propene in the presence of peroxide gives 
(a) iso-propyl bromide
(b) 3-bromo propane
(c) ally! bromide
(d) n-propyl bromide       

Question. o-toluic acid on reaction with Br₂ + Fe gives   

Question. Which one of these is not true for benzene? 
(a) It fonns only one type of monosubstituted product
(b) There are three carbon-carbon single bonds and three carbon-carbon double bonds
(c) The heat of hydrogenation of benzene is less than the theoretical value
(d) The bond angle between the carbon-carbon bonds is     

Question. The strongest ortho/para directing group is 
(a) —NH₂
(b) —CH₃
(c) —Cl
(d) —C₂H₅     

Question. Which of the following species is aromatic?

Question. Under which one of the following conditions, does the eaction, CH= CH + CH₃OH →
CH₃O—CH = CH₂ take place? 
(a) NH₄OH / 80° C
(b) Cone. H₂SO₄ / 160° C
(c) Anhydrous ZnCl₂ / 150° C
(d) Dilute HCl/fHF, 80°C
(e) CH₃OK / 160- 200° C     

Question. The major product Pin the following reaction is 

Question. In the following sequence of reactions, the alkene affords the compound B
CH₃CH=CHCH₃ →^O3 A →_Zn^H2O B
The compound B is
(a) CH₃CH₂CHO
(c) CH₃CH₂COCH₃
(b) CH₃COCH₃
(d) CH₃CHO       

Question. The hydrocarbon which can react with sodium in liquid ammonia is 
(a) CH₃CH₂CH2C= CCH₂CH₂CH₃
(b) CH₃CH₂C=CH
(c) CH₃CH = CHCH₃
(d) CH₃CH₂C = CCH₂CH₃       

Question. Which one of the compound does not dissolve in concentrated H₂SO₄ ?
(a) Hexane
(b) Benzene
(c) Ethylene
(d) Aniline       

Question. What is one of the products of the addition of HBr to 2-butene? 
(a) 1-bromobutane
(b) 2-bromobutane
(c) 1,2-dibromobutane       
(d) 2, 3-dibromobutane     

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