MCQ Questions Chapter 13 Hydrocarbons Class 11 Chemistry

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     

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       

Question. In the series, 

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

Question. Propyne on passing through red hot iron tube gives

Question. Ozonolysis products of an olefin are

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

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       

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

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

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       

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

Question. Identify Band Din the following sequence ofreactions.   

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

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

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         

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     

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

(a) 0
(b) 1
(c) 2
(d) 4       

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     

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       

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

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

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 

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     

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

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

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

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     

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

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

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         

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

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         

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     

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         

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

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.)     

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     

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     

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     

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     

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     

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

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       

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       

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     

Question. Propene on reaction with hypochlorous acid to give   

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   

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         

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 

Question. In the reaction sequence, Products will be
CH₃CH=CH₂    →^(i)O₃      Products will be
                        ^{(ii) H2O/Zn}
(a) CH₃ COCH₃ 
(b) CH₃ COCH₂OH
(c) CH₃ COOH + HCOOH
(d) CH₃ CHO + HCHO      

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     

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     

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

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

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     

Question. Select the reagent for the following reaction, 

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

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

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

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

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   

Question. CH₃ CH₃ + HNO₃ →^{675 K} ?
(a) CH₃CH₂NO₂
(b) CH₃CH₂NO₂ + CH₃NO₂
(c) 2CH₃NO₂
(d) CH₂ = CH₂