MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

MCQ Questions Class 11

Please refer to Hydrocarbons MCQ Questions Class 11 Chemistry below. These MCQ questions for Class 11 Chemistry with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Hydrocarbons will help you to prepare for the exams and get more marks.

Hydrocarbons MCQ Questions Class 11 Chemistry

Please see solved MCQ Questions for Hydrocarbons in Class 11 Chemistry. All questions and answers have been prepared by expert faculty of standard 11 based on the latest examination guidelines.

MCQ Questions Class 11 Chemistry Hydrocarbons

Question. Ethylene can be converted into alcohol by treatment with
(a) aq KOH 
(b) dil. H2SO4
(c) moist silver oxide
(d) Zn/HCI     

Answer

B

Question. Which of the following is the predominant product in the reaction of HO Br with propene? 
(a) 2-bromo-1-propanol
(b) 3-bromo-1-propanol
(c) 2-bromo-2-propanol
(d) l-bromo-2-propanol       

Answer

D

Question. In the series, 

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry

The compound Z is
(a) CH3CH2CH = CH2
(b) CH3COCH3
(c) CH3CHO
(d) CH3CH2CH2CHO     

Answer

B

Question. Propyne on passing through red hot iron tube gives

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry
Answer

A

Question. Ozonolysis products of an olefin are

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

C

Question. CH3 — CH = CH2 + NOCI → P
Identify the adduc

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry
Answer

A

Question. Identify Bin the following reaction,
CH2=CH2 + HCl →Anhy.AICl3 A + 2[H] →Zn-Cu B + HCI
                                                                      C2H5OH 
(a) CH4
(b) C2H6
(c) C2H5CI
(d) C2H5OH       

Answer

B

Question. Which one of the following has the minimum boiling point? 
(a) n-butane
(b) 1-butyne
(c) I-butene
(d) Iso-butene     

Answer

D

Question. The compound with highest boiling point 
(a) n-hexane
(b) n-pentane
(c) 2, 2-dimethylpropane
(d) 2-methylbutane     

Answer

A

Question. When acetylene is passed through dil. H2SO4 in presence of HgSO4 , the compound fo1med is 
(a) ether
(b) acetaldehyde
(c) acetic acid
(d) ketone       

Answer

B

Question. Propyne on ozonolysis gives 
(a) CH3COOH + HCOOH
(b) CH3COOH + HCHO
(c) CH3CHO + HCHO
(d) CH3CHO + HCOOH       

Answer

A

Question. Identify Band Din the following sequence ofreactions.   

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry

(a) Methanol and bromoethane 
(b) Ethyl hydrogen sulphate and alcoholic KOH
(c) Ethyl hydrogen sulphate and aqueous KOH
(d) Ethanol and alcoholic KOH       

Answer

D

Question. 2-hexyne gives trans-2-hexene on treatment with
(a) Pt/H2
(b) Li/NH3
(c) Pd/BaSO4
(d) LiAlH4       

Answer

B

Question. One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is 
(a) propene
(b) I-butene
(c) 2-butene
(d) ethene         

Answer

C

Question. Which compound does not give precipitate with anlflloniacal silver nitrate solution? 
(a) C2H5—C= CH
(b) CH3—C=C—CH3 
              CH3
              l
(c) CH3—CH—C=CH
(d) Ph—CH2—C=CH     

Answer

B

Question. The nwnber of optically active products obtained from the complete ozonolysis of the given compound   

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry

(a) 0
(b) 1
(c) 2
(d) 4       

Answer

A

Question. Which of the following fraction of coaltar distillation is obtained at 270°-360°C?
(a) Light oil
(b) Middle oil
(c) Green oil
(d) Heavy oil     

Answer

C

Question. Cetane is a compound which has very good ignition property. Chemically it is
(a) CH3 (CH2 )14 CH3
(b) (CH3)3 C(CH2 )11 CH3
(c) C17H34
(d) None of the above       

Answer

A

Question. LPG mainly contains 
(a) ethyne
(b) butane
(c) methane
(d) ethane       

Answer

B

Question. Petroleum is obtained from water gas, name of the reaction involved is 
(a) Fischer-Tropsch
(b) Bengoic
(c) Dow’s
(d) Kjeldahl’s     

Answer

A

Question. Which of the following is correct number of carbon atom present as the constituent of kerosene oil ?
(a) C10—C16
(b) C4—C6
(c) C8—C16
(d) C12—C18 

Answer

A

Question. Which of the following increases the octane number ?
(a) Branching of chain
(b) Absence of double and triple bond
(c) Non-cyclic alkanes
(d) None of the above     

Answer

A

Question. Tetraethyl lead is a
(a) solvent
(b) petroleum additive
(c) oxidising agent
(d) fire extinguisher     

Answer

B

Question. In laboratory burners, we use 
(a) producer gas
(b) oil gas
(c) gobar gas
(d) coal gas     

Answer

B

Question. Which of the following is present in natw-al gas ?
(a) n-butane
(b) Ethane 
(c) Methane
(d) Propane     

Answer

C

Question. Isomers of hexane, based on their branching can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is     

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry

(a) I > II > III
(b) III > II > I
(c) II > III > I
(d) III > I > II   

Answer

B

Question. Which of the following alkenes gives an acetaldehyde on ozonolysis ?
(a) Ethene
(b) Propene
(c) 1 -butene
(d) 2-butene       

Answer

D

Question. When C2H2, CH4 and C2H4 passes through a test tube which have ammoniacal Cu2Cl2, find out which gas comes out unaffected from test tube ?
(a) C2H2 and CH4
(b) C2H2 and C2H4
(c) C2H2 and CH4
(d) C2H2         

Answer

C

Question. In the following reaction,
C2H2       →H2O     X ⇌ CH3CHO.
           HgSO4/H2SO4
What is X ? 
(a) CH3CH2OH
(b) CH— O — CH3
(c) CH3CH2CHO
(d) CH2 = CHOH         

Answer

D

Question. Acetylene and HCHO react in presence of copper acetylide catalyst to form 
(a) 1-butyne-1, 4-diol
(b) 2-butyne-1, 2-diol
(c) 2-butyne-1 , 4-diol
(d) None of these         

Answer

C

Question. In the reactions,
     Lindlar catalyst/ H2                      Na/NH         
B          ←                  RC = CR       →     A
                                                     H2                                    
A and B are geometrical isomers. Then,
(a) A is cis and Bis trans
(b) A is trans and B is cis
(c) A and Bare cis
(d) A and B are transA     

Answer

B

Question. Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide? 
(a) Te1tiarybutyl chloride
(b) Neo-pentane
(c) ]so-hexane
(d) Neo-hexane         

Answer

B

Question. The treatment of CH3MgX with CH3C=C- H produces 
(a) CH3 -CH= CH2
(b) CH3C = C—CH3
                H   H
                l    l
(c) CH—C= C—CH3
(d) CH4       

Answer

D

Question. What are X and Y respectively in the following reaction?
Z-product ←Y 2-butyne →X E- product
(a) Na/NH3 (liq.) and Pd/BaSO4 + H2
(b) Ni/140°C and Pd/BaSO4 + H2
(c) Ni/140°C and Na/NH3(liq.)
(d) Pd/BaSO4 + H2 and Na/NH3(liq.)     

Answer

A

Question. An alkene on vigorous oxidation with KMnO4 gives only acetic acid. The alkene is 
(a) CH3CH2CH = CH2
(b) CH3CH = CHCH3
(c) (CH3)2C=CH2
(d) CH3CH= CH2     

Answer

B

Question. Which one of the following compounds will react with methyl magnesium bromide?
(a) CH3CH2CH2CH2CH3
(b) CH3CH = CH—CH= CH2
(c) CH3 —C = C—CH2CH3
(d) CH3CH2CH2C = CH     

Answer

D

Question. Which of the following is correct order according to boiling point? 
(a) n-pentane < n-hexane < 2, 3-dimethyl butane
(b) n-pentane < 2, 3-dirnethyl butane< n-hexane
(c) 2, 3-din1ethyl butane< n-hexane < n-pentane
(d) n-hexane < 2, 3-dirnethyl butane< n-pentane     

Answer

B

Question. The major organic compound formed by the reaction of 1, 1, 1- trichloroethane with silver powder is
(a) acetylene
(b) ethene
(c) 2-butyne
(d) 2-butene     

Answer

C

Question. Which of the following is correct order according to boiling point? 
(a) n-pentane < n-hexane < 2, 3-dimethyl butane
(b) n-pentane < 2, 3-dirnethyl butane< n-hexane
(c) 2, 3-din1ethyl butane< n-hexane < n-pentane
(d) n-hexane < 2, 3-dirnethyl butane< n-pentane     

Answer

B

Question. Ammoniacal cuprous chloride will give red precipitate with which one of the following ? 
(a) CH3 —C = C—CH3
(b) CH3 —CH = CH2
(c) CH—C=CH
(d) CH3 —CH= CH—CH3       

Answer

C

Question. The dihalogen derivative X of a hydrocarbon with three carbon atoms reacts with alcoholic KOH and produces another hydrocarbon which forms a red precipitate with ammoniacal Cu2Cl2 . X gives an aldehyde on reaction with aqueous KOH. The compound Xis 
(a) 1, 3-dichloropropane
(b) 1, 2-dichloropropane
(c) 2, 2-dichloropropane
(d) 1, 1-dichloropropane
(e) 1, 3-dichloropropene       

Answer

A

Question. Which one of the following gives, on ozonolysis, both aldehydes and ketones ? 
(a) Me2C==CHMe
(b) Me2C=CMe2
(c) MeCH2— C(Me) = CMe2
(d) MeCH(Me)—CH = CHMe       

Answer

B

Question. The Markownikoff’s rule is the best applicable to the reaction between 
(a) C2H4 + HCI
(b) C3H6 + Br2
(c) C3H6 + HBr
(d) C3H8 + Cl2
(e) C2H4 + I2     

Answer

C

Question. Propene on reaction with hypochlorous acid to give   

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry
Answer

A

Question. An alkene on reductive ozonolysis gives 2-molecules of CH2 (CHO)2 . The alkene is
(a) 2, 4-hexadiene
(b) 1, 3-cyclohexadiene
(c) 1, 4-cyclohexadiene
(d) 1-methyl- 1, 3-cyclopentadiene
(e) 1, 2-dirnethyl cyclopropene   

Answer

C

Question. HBr reacts with CH2= CH—OCH3 under anhydrous conditions at room temperature to give 
(a) CH3CHO and CH3Br
(b) BrCH2CHO and CH3OH
(c) BrCH2 — CH2 — OCH3
(d) H3C — CHBr— OCH3         

Answer

D

Question. Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound Eon further treatment with aqueous KOH yields compound F. Compound F is 

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry
Answer

A

Question. In the reaction sequence, Products will be
CH3CH=CH2    →(i)O3      Products will be
                        (ii) H2O/Zn
(a) CHCOCH
(b) CHCOCH2OH
(c) CHCOOH + HCOOH
(d) CHCHO + HCHO      

Answer

D

Question. 2-methylbutane on reacting with bromine in the presence of sunlight gives mainly 
(a) l-bromo-3-methylbutane
(b) 2-bromo-3-methylbutane
(c) 2-bromo-2-methylbutane
(d) l-bromo-2-methylbutane     

Answer

C

Question. When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is
(a) methanoic acid
(b) ethanal 
(c) methanol
(d) methanal     

Answer

D

Question. Ethylene reacts with 1 % alkaline KMnO4 to form
(a) oxalic acid
(b) ethylene glycol
(c) ethyl alcohol
(d) HCHO     

Answer

B

Question. What is the product formed when acetylene reacts with hypochlorous acid ? 
(a) CH3COCI
(b) ClCH2CHO
(c) Cl2CHCHO
(d) ClCH2COOH             

Answer

C

Question. A compoundX on ozonolysis followed by reduction gives an aldehyde C2H4O and 2-butanone. Compound Xis
(a) 3-methyl pentene-2
(b) 3-methyl pentene-3
(c) 3-methyl hexene-3
(d) 3-ethyl pentene-3     

Answer

A

Question. Select the reagent for the following reaction, 

MCQ Questions  Chapter 13 Hydrocarbons  Class 11 Chemistry

(a) SeO2
(b) O3 ,Zn/ H2O
(c) O3, H2O2-CH3COOH
(d) PCC    

Answer

B

Question. According to Markownikoffs rule, what will be the major product of reaction,
CH2= CH—CH3HBr ?
              Br
              l
(a) CH3—CH—CH3
(b) Br—CH2—CH2—CH3
(c) CH2= CH—CH2Br
(d) CH2=C=CH2     

Answer

A

Question. Propyne on passing through red hot copper tube forms
(a) benzene
(b) toluene 
(c) mesitylene
(d) None of these     

Answer

C

Question. Mustard gas is a
(a) oil gas
(b) poisonous gas
(c) fuel gas
(d) life gas       

Answer

B

Question. In the following reaction,
RCH2CH= CH2 + ICI → A
Markownikoff’s product A is 
(a) RCH2 CH—CH2I
               l
              Cl 
(b) RCH2 CH—CH2CI
              l
              I
(c) RCH2—C=CH2
                l
                I
(d) RCH=CH—CH2I   

Answer

A

Question. CH3 CH3 + HNO3675 K ?
(a) CH3CH2NO2
(b) CH3CH2NO2 + CH3NO2
(c) 2CH3NO2
(d) CH2 = CH2     

Answer

B

Hydrocarbons MCQ Questions Class 11 Chemistry