MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

MCQ Class 11

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

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

(a) P
(b) Q
(c) R
(d) S       

Answer

C

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       

Answer

D

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

Answer

B

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     

Answer

D

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

Answer

A

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

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

B

Question. The non-aromatic compound among the following is 

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

A

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      

Answer

D

Question. Which of the following molecules/species are aromatic 

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

D

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

Answer

C

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

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

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

Answer

D

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

Answer

A

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

Answer

A

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

Answer

B

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

Answer

C

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

Answer

C

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

Answer

B

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     

Answer

A

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

Answer

C

Question. Identify C in the following   

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

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

Answer

B

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     

Answer

D

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         

Answer

D

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     

Answer

B

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         

Answer

D

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     

Answer

A

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

Answer

B

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

Answer

D

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

Answer

A

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

Answer

B

Question. The1mal decomposition of

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

A

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         

Answer

A

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

Answer

B

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     

Answer

D

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     

Answer

D

Question. [A] →Lindlar’s catalyst CH3 — C=C — CHNa 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   

Answer

A

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

Answer

D

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

Answer

D

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     

Answer

A

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   

Answer

A,B.D

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

Answer

D

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 →     

Answer

A

Question. In the sequence of reactions,
C2H4HBr X  → AgCN y →H2/Ni[H] Z,
compound Z is
(a) N-rnethyl ethanamine
(c) N, N-clirnethylarnine
(b) N-propylamine
(d) ethyl cyanide       

Answer

A

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     

Answer

D

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  

Answer

A

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

Answer

B

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

Answer

A

Question. n-C7H16 →V2O5, S00’C1020atm. A →CI2 B What is B in the above reaction?
(a) Benzyl chloride
(b) Benzal chloride
(c) Hexachlorobenzene
(d) Benzene hexachloride     

Answer

B

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       

Answer

D

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     

Answer

B

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       

Answer

D

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

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

D

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     

Answer

B

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

Answer

A

Question. Which of the following species is aromatic?

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

B

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     

Answer

E

Question. The major product Pin the following reaction is 

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry
Answer

B

Question. In the following sequence of reactions, the alkene affords the compound B
CH3CH=CHCH3O3 A →ZnH2O B
The compound B is
(a) CH3CH2CHO
(c) CH3CH2COCH3
(b) CH3COCH3
(d) CH3CHO       

Answer

D

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

Answer

B

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

Answer

A

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     

Answer

B

MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

We hope you liked the above provided MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry with solutions. If you have any questions please ask us in the comments box below.