JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank

done Alkene Total Questions - 174

• question_answer1)
  Addition of bromine to 1, 3-butadiene gives [CPMT 1987, 93]
  A)
  1, 2 addition product only done clear
  B)
  1, 4 addition product only done clear
  C)
  Both 1, 2 and 1, 4 addition products done clear
  D)
  No reaction done clear
  View Solution play_arrow

• question_answer2)
  When ethylene bromide is treated with \[Zn,\] we get [RPMT 1997]
  A)
  Alkane done clear
  B)
  Alkene done clear
  C)
  Alkyne done clear
  D)
  All done clear
  View Solution play_arrow

• question_answer3)
  Ethene when treated with \[B{{r}_{2}}\] in the presence of \[CC{{l}_{4}}\] which compound is formed [RPMT 1997; DCE 2001; KCET (Med.) 1999]
  A)
  1, 2-dibromoethane done clear
  B)
  1-bromo-2-chloroethane done clear
  C)
  Both A and B done clear
  D)
  1, 1, 1-tribromoethane done clear
  View Solution play_arrow

• question_answer4)
  In a reaction \[C{{H}_{2}}=C{{H}_{2}}\underset{acid}{\mathop{\xrightarrow{\text{Hypochlorous}}}}\,M\xrightarrow{R}\begin{matrix}    C{{H}_{2}} & - & OH  \\    |\,\,\,\,\,\,\, & {} & {}  \\    C{{H}_{2}} & - & OH  \\ \end{matrix}\] Where M = molecule; R = reagent M and R are [CBSE PMT 1997; CPMT 2001]
  A)
  \[C{{H}_{3}}C{{H}_{2}}Cl\] and NaOH done clear
  B)
  \[C{{H}_{2}}Cl-C{{H}_{2}}OH\] and \[\text{aq}\text{. }NaHC{{O}_{3}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}OH\] and HCl done clear
  D)
  \[C{{H}_{2}}=C{{H}_{2}}\] and heat done clear
  View Solution play_arrow

• question_answer5)
  Alkenes usually show which type of reaction [AIIMS 1999; MADT Bihar 1980]
  A)
  Addition done clear
  B)
  Substitution done clear
  C)
  Elimination done clear
  D)
  Superposition done clear
  View Solution play_arrow

• question_answer6)
  The propene reacts with HBr to form [AIIMS 1999; RPET 1999]
  A)
  Ethane done clear
  B)
  Hexane done clear
  C)
  1-bromo-propane done clear
  D)
  2-bromo propane done clear
  View Solution play_arrow

• question_answer7)
  Ethylene may be obtained by dehydration of which of the following with concentrated \[{{H}_{2}}S{{O}_{4}}\] at \[160-{{170}^{o}}C\] [RPET 1999]
  A)
  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  B)
  \[C{{H}_{3}}OH\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] done clear
  D)
  \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH\] done clear
  View Solution play_arrow

• question_answer8)
  \[\begin{matrix}    {{H}_{3}}C & {} & C{{H}_{3}}  \\    {} & >C=C< & {}  \\    {{H}_{3}}C & {} & C{{H}_{3}}  \\ \end{matrix}\underset{KOH\,\text{(heat)}}{\mathop{\xrightarrow{X}}}\,\begin{matrix}    C{{H}_{3}} & {} & C{{H}_{3}}  \\    {} & >C=O+O=C< & {}  \\    C{{H}_{3}} & {} & C{{H}_{3}}  \\ \end{matrix}\] \[X\] in the above reaction is [CPMT 1985, 93]
  A)
  \[HN{{O}_{3}}\] done clear
  B)
  \[{{O}_{2}}\] done clear
  C)
  \[{{O}_{3}}\] done clear
  D)
  \[KMn{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer9)
  The disappearance of the characteristic purple colour of \[KMn{{O}_{4}}\] in its reaction with an alkene is the test for unsaturation. It is known as [CPMT 1989, 94; CBSE PMT 1990]
  A)
  Markownikoff's test done clear
  B)
  Baeyer's test done clear
  C)
  Wurtz's test done clear
  D)
  Grignard test done clear
  View Solution play_arrow

• question_answer10)
  A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline\[KMn{{O}_{4}}\]. The gas is [KCET 2003]
  A)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  B)
  \[C{{H}_{4}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer11)
  \[C{{H}_{3}}-C{{H}_{2}}-Cl\xrightarrow{alc.KOH}A\], the product is [CPMT 2003]
  A)
  \[C{{H}_{3}}C{{H}_{2}}OK\] done clear
  B)
  \[C{{H}_{3}}CHO\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}OC{{H}_{2}}C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer12)
  The final product formed when ethyl bromide is treated with excess of alcoholic KOH is [MP PET 1999]
  A)
  Ethylene done clear
  B)
  Ethane done clear
  C)
  Ethyne done clear
  D)
  Vinyl bromide done clear
  View Solution play_arrow

• question_answer13)
  Which of the following hydrocarbons cannot be obtained by Sabatier and Senderen's reaction
  A)
  \[C{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{8}}\] done clear
  D)
  All done clear
  View Solution play_arrow

• question_answer14)
  When 3, 3-dimethyl-2-butanol is heated with \[{{H}_{2}}S{{O}_{4}}\] the major product obtained is [CBSE PMT 1995]
  A)
  cis and trans isomers of 2, 3-dimethyl-2-butene done clear
  B)
  3, 3-dimethyl-1-butene done clear
  C)
  2, 3-dimethyl-2-butene done clear
  D)
  2, 3-dimethyl-1-butene done clear
  View Solution play_arrow

• question_answer15)
  The intermediate during the addition of HCl to propene in the presence of peroxide is [IIT-JEE 1997]
  A)
  \[C{{H}_{3}}\overset{\bullet \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHC{{H}_{2}}}}\,Cl\] done clear
  B)
  \[\overset{+\,\,\,\,\,}{\mathop{C{{H}_{3}}CHC{{H}_{3}}}}\,\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}\overset{\bullet \,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}\overset{+\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,\] done clear
  View Solution play_arrow

• question_answer16)
  \[C{{H}_{2}}=C{{H}_{2}}\underset{KOH/{{H}_{2}}O}{\mathop{\xrightarrow{KMn{{O}_{4}}}}}\,X\]. Product 'X' in above reaction is [RPMT 2003]
  A)
  Ethylene glycol done clear
  B)
  Glucose done clear
  C)
  Ethanol done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer17)
  Which of the following compounds represents acrylonitrile [JIPMER 1997]
  A)
  Vinyl cyanide done clear
  B)
  Cyanoethene done clear
  C)
  Prop-2-ene nitrile done clear
  D)
  All of them done clear
  View Solution play_arrow

• question_answer18)
  When acetylene reacts with arsenic trichloride in the presence of anhydrous aluminium chloride, it produces [AFMC 1999]
  A)
  Lewisite done clear
  B)
  b-chlorovinyl dichloroarisine done clear
  C)
  Nitrobenzene done clear
  D)
  Both A and B done clear
  View Solution play_arrow

• question_answer19)
  Ozonolysis of which one of the following will give two molecules of acetaldehyde [Bihar MEE 1997; MP PET 2000]
  A)
  1-butene done clear
  B)
  2-butene done clear
  C)
  1-pentene done clear
  D)
  2-pentene done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer20)
  In which of the following, addition of \[HBr\] does not take place against Markownikoff's rule or Anti-Markownikoff addition of \[HBr\] is not observed for [IIT-JEE 1985; CBSE PMT 1994; MADT Bihar 1995; MP PMT 1999; AMU 2002]
  A)
  Propene done clear
  B)
  But-1-ene done clear
  C)
  But-2-ene done clear
  D)
  Pent-2-ene done clear
  View Solution play_arrow

• question_answer21)
  Which one of the following characteristics apply to both ethene and ethyne [NCERT 1990]
  A)
  Explode when mixed with chlorine done clear
  B)
  Decolourise Baeyer's reagent giving brown precipitate done clear
  C)
  Rapidly absorbed by cold conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
  Form white precipitate with silver nitrate solution done clear
  View Solution play_arrow

• question_answer22)
  Which of the following has highest knocking property
  A)
  Aromatic hydrocarbons done clear
  B)
  Olefins done clear
  C)
  Branched chain paraffins done clear
  D)
  Straight chain paraffins done clear
  View Solution play_arrow

• question_answer23)
  Dilute aqueous \[KMn{{O}_{4}}\], at room temperature reacts with \[\text{ }R-CH=CH-R\]to give [Roorkee 1992]
  A)
  R - CHO done clear
  B)
  R - COOH done clear
  C)
  RCHOH - CHOHR done clear
  D)
  \[C{{O}_{2}}+{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer24)
  Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly [Roorkee 1992]
  A)
  Isobutyl hydrogen sulphate done clear
  B)
  2-methyl-2-butanol done clear
  C)
  2-methyl-1-butanol done clear
  D)
  Secondary butyl hydrogen sulphate done clear
  View Solution play_arrow

• question_answer25)
  How can ethene be produced from ethanol [BHU 1996]
  A)
  By dehydrohalogenation done clear
  B)
  By dehydrogenation done clear
  C)
  By dehydration with conc. \[{{H}_{2}}S{{O}_{4}}\] at \[{{170}^{o}}C\] done clear
  D)
  By reduction with hydrogen iodide done clear
  View Solution play_arrow

• question_answer26)
  Baeyer's reagent is used in the laboratory for [CBSE PMT 1991, 92; AIIMS 1998; AFMC 1999]
  A)
  Detection of double bonds done clear
  B)
  Detection of glucose done clear
  C)
  Reduction done clear
  D)
  Oxidation done clear
  View Solution play_arrow

• question_answer27)
  Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. \[{{H}_{2}}S{{O}_{4}}\] and \[{{H}_{2}}O\] [MP PMT 1999]
  A)
  Ethylene done clear
  B)
  Propylene done clear
  C)
  2-methyl propene done clear
  D)
  Isoprene done clear
  View Solution play_arrow

• question_answer28)
  Which of the following compound is produced when \[C{{H}_{2}}=CH-{{(C{{H}_{2}})}_{2}}COOH\] reacts with HBr in presence of peroxides [AIIMS 2000]
  A)
  \[C{{H}_{3}}CH{{(C{{H}_{2}})}_{5}}COOH\] done clear
  B)
  \[BrC{{H}_{2}}C{{H}_{2}}{{(C{{H}_{2}})}_{5}}COOH\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}{{(C{{H}_{2}})}_{5}}COOH\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}BrC{{H}_{2}}C{{H}_{2}}COOH\] done clear
  View Solution play_arrow

• question_answer29)
  One mole of each of the following alkenes is catalytically hydrogenated. The quantity of heat evolved will be the lowest in the case of [Roorkee 2000]
  A)
  1-butene done clear
  B)
  Trans-2-butene done clear
  C)
  Cis-2-butene done clear
  D)
  1, 3-butadiene done clear
  View Solution play_arrow

• question_answer30)
  Which of the following is not used to distinguish ethene from ethane [KCET (Med.) 2001; UPSEAT 2002; CBSE PMT 2002]
  A)
  Iodine in \[CC{{l}_{4}}\] done clear
  B)
  Bromine in \[CC{{l}_{4}}\] done clear
  C)
  Alkaline \[KMn{{O}_{4}}\] done clear
  D)
  Ammonical \[C{{u}_{2}}C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer31)
  A hydrocarbon X adds on one mole of hydrogen to give another hydrocarbon and decolourised bromine water. X reacts with \[KMn{{O}_{4}}\]in presence of acid to give two moles of the same carboxylic acid. The structure of X is [JIPMER 2001]
  A)
  \[C{{H}_{2}}=CH-C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-CH=CHC{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{2}}C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer32)
  When 2-bromobutane reacts with alcoholic KOH, the reaction is called [KCET (Med.) 2001]
  A)
  Halogenation done clear
  B)
  Hydrogenation done clear
  C)
  Chlorination done clear
  D)
  Dehydro-halogenation done clear
  View Solution play_arrow

• question_answer33)
  1, 3-butadiene reacts with ethylene to form [BHU 2001]
  A)
  Benzene done clear
  B)
  Cyclohexane done clear
  C)
  Cyclohexene done clear
  D)
  2, 3 dimethyl butane done clear
  View Solution play_arrow

• question_answer34)
  Ethylene reacts with ozone gas to form the compound [UPSEAT 2001]
  A)
  \[HCHO\] done clear
  B)
  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  C)
  \[O\,<\,\begin{matrix}    \underset{|}{\mathop{C}}\,{{H}_{2}}-\underset{|}{\mathop{O}}\,  \\    C{{H}_{2}}-O  \\ \end{matrix}\] done clear
  D)
  \[C{{H}_{3}}CHO\] done clear
  View Solution play_arrow

• question_answer35)
  Oils are converted into fats by [Kerala (Med.) 2002]
  A)
  Hydration done clear
  B)
  Decarboxylation done clear
  C)
  Hydrogentation done clear
  D)
  Dehydrogenation done clear
  E)
  Hydrogenolysis done clear
  View Solution play_arrow

• question_answer36)
  Which process converts olefins into parafins [MP PET 2002]
  A)
  Halogenation done clear
  B)
  Dehydration done clear
  C)
  Hydrogenation done clear
  D)
  Hydrolysis done clear
  View Solution play_arrow

• question_answer37)
  Of the following the formula which represents a saturated cyclic compound is [AMU 1983]
  A)
  \[{{C}_{3}}{{H}_{6}}\] done clear
  B)
  \[{{C}_{3}}{{H}_{8}}\] done clear
  C)
  \[{{C}_{8}}{{H}_{10}}\] done clear
  D)
  \[{{C}_{8}}{{H}_{12}}\] done clear
  View Solution play_arrow

• question_answer38)
  In a reaction, if half of the double bond is broken and two new bonds are formed, this is a case of [AMU 1983; NCERT 1978; CPMT 1983]
  A)
  Elimination done clear
  B)
  Addition done clear
  C)
  Displacement done clear
  D)
  Rearrangement done clear
  View Solution play_arrow

• question_answer39)
  Which of the following are formed on addition reaction of DCI with 3-methyl-1-butene [Roorkee 2000]
  A)
  \[C{{H}_{2}}DCHClCH{{(C{{H}_{3}})}_{2}}\] done clear
  B)
  \[C{{H}_{2}}DC{{H}_{2}}CCl{{(C{{H}_{3}})}_{2}}\] done clear
  C)
  \[C{{H}_{3}}CDClCH{{(C{{H}_{3}})}_{2}}\] done clear
  D)
  \[ClC{{H}_{2}}CHDCH{{(C{{H}_{3}})}_{2}}\] done clear
  View Solution play_arrow

• question_answer40)
  Major product of the following reaction is \[C{{H}_{3}}\underset{H}{\mathop{\underset{|}{\mathop{\overset{Br}{\mathop{\overset{|}{\mathop{-C-}}\,}}\,}}\,}}\,C{{H}_{2}}-C{{H}_{3}}+alco.\,KOH\to \] [MP PMT 1986]
  A)
  Butene-1 done clear
  B)
  Butene-2 done clear
  C)
  Butane done clear
  D)
  Butyne-1 done clear
  View Solution play_arrow

• question_answer41)
  Cyclopentene on treatment with alkaline \[KMn{{O}_{4}}\] gives [CPMT 1987]
  A)
  Cyclopentanol done clear
  B)
  trans 1, 2-cyclopentanediol done clear
  C)
    cis 1, 2-cyclopentanediol done clear
  D)
  1 : 1 mixture of cis and trans 1, 2-cyclopentanediol done clear
  View Solution play_arrow

• question_answer42)
  Which of the following is the most stable alkene [AIIMS 1998; KCET (Med.) 2000; CPMT 2003]
  A)
  \[{{R}_{2}}C=C{{R}_{2}}\] done clear
  B)
  \[RCH=CHR\] done clear
  C)
  \[RC{{H}_{2}}=C{{H}_{2}}R\] done clear
  D)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer43)
  Ethene gives with acidic \[KMn{{O}_{4}}\] solution [MP PMT 1997]
  A)
  Ethylene glycol done clear
  B)
  Ethylene oxide done clear
  C)
  Formaldehyde done clear
  D)
  Acetaldehyde done clear
  View Solution play_arrow

• question_answer44)
  In paraffins, with the increasing molecular weight, it is found that [CPMT 1974]
  A)
  Freezing point decreases done clear
  B)
  Boiling point decreases done clear
  C)
  Boiling point increases done clear
  D)
  Vapour pressure decreases done clear
  View Solution play_arrow

• question_answer45)
  When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is [CPMT 1990]
  A)
  Ethylene done clear
  B)
  Ethyne done clear
  C)
  Cyclobutane done clear
  D)
  Butane done clear
  View Solution play_arrow

• question_answer46)
  A gas formed by the action of alcoholic KOH on ethyl iodide, decolorises alkaline \[KMn{{O}_{4}}\] solution. The gas is [CPMT 1974, 91; MP PET 1985; IIT-JEE 1982]
  A)
  \[C{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer47)
  Markownikoff's rule provides guidance of addition of HBr on [MNR 1994]
  A)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}CH=CHC{{H}_{3}}\] done clear
  D)
  \[C{{H}_{2}}=CHBr\] done clear
  View Solution play_arrow

• question_answer48)
  Ethyl bromide gives ethylene when reacted with [CPMT 1982, 93; RPET 2000; Pb. PMT 2001]
  A)
  Ethyl alcohol done clear
  B)
  Dilute \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  Aqueous KOH done clear
  D)
  Alcoholic KOH done clear
  View Solution play_arrow

• question_answer49)
  Ethylene is prepared by the dehydration of [CPMT 1974, 79; DPMT 1985; BHU 1989]
  A)
  Ethyl alcohol done clear
  B)
  Methyl alcohol done clear
  C)
  Acetic acid done clear
  D)
  Oxalic acid done clear
  View Solution play_arrow

• question_answer50)
  Which reactions are most common in alkenes [Pb. CET 1989]
  A)
  Electrophilic substitution reactions done clear
  B)
  Nucleophilic substitution reactions done clear
  C)
  Electrophilic addition reactions done clear
  D)
  Nucleophilic addition reactions done clear
  View Solution play_arrow

• question_answer51)
  A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives [NCERT 1990]
  A)
  1-propene done clear
  B)
  2-propene done clear
  C)
  Isopropylene done clear
  D)
  All the three done clear
  View Solution play_arrow

• question_answer52)
  The compound formed by passing ethylene gas into cold alkaline solution of \[KMn{{O}_{4}}\] is [NCERT 1974, 81; CPMT 1979, 86, 88; MP PET 1985, 95; AFMC 1998]
  A)
  Ethyl alcohol done clear
  B)
  Acetaldehyde done clear
  C)
  Acetic acid done clear
  D)
  Ethylene glycol done clear
  View Solution play_arrow

• question_answer53)
  A gas decolourised \[KMn{{O}_{4}}\] solution but gives no precipitate with ammoniacal cuprous chloride is or Which of the following gases does not give a precipitate with ammoniacal solution of silver nitrate but decolourizes \[KMn{{O}_{4}}\] (neutral or slightly alkaline) [NCERT 1974, 77; CPMT 1974, 77, 78; MP PMT 1996; MP PET 1996, 99]
  A)
  Ethane done clear
  B)
  Methane done clear
  C)
  Ethene done clear
  D)
  Acetylene done clear
  View Solution play_arrow

• question_answer54)
  A hydrocarbon reacts with hypochlorous acid to give 1-chloro-2-hydroxyethane. The hydrocarbon is [CBSE PMT 1989]
  A)
  Ethylene done clear
  B)
  Methane done clear
  C)
  Ethane done clear
  D)
  Acetylene done clear
  View Solution play_arrow

• question_answer55)
  When ethene is heated at \[{{400}^{o}}C\] under high pressure, the product is/are
  A)
  Carbon and \[{{H}_{2}}\] done clear
  B)
  Polyethylene done clear
  C)
  Acetylene and \[{{H}_{2}}\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer56)
  Which decolorize aqueous bromine and gives white fumes of HCl on reaction with \[PC{{l}_{5}}\] [Pb. PMT 1999]
  A)
  \[C{{H}_{3}}COC{{H}_{2}}CH=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}OH\] done clear
  D)
  \[C{{H}_{3}}OC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\] done clear
  View Solution play_arrow

• question_answer57)
  During debromination of meso-dibromobutane, the major compound formed is [IIT-JEE 1997]
  A)
  n-butane done clear
  B)
  1-butane done clear
  C)
  cis-2-butene done clear
  D)
  trans-2-butene done clear
  View Solution play_arrow

• question_answer58)
  What product is formed when 1-chlorobutane react with alcoholic KOH [RPMT 2002]
  A)
  1-butene done clear
  B)
  2-butene done clear
  C)
  1-butanol done clear
  D)
  2-butanol done clear
  View Solution play_arrow

• question_answer59)
  The olefin which on ozonolysis gives \[C{{H}_{3}}C{{H}_{2}}CHO\] and \[C{{H}_{3}}CHO\] is [Roorkee 1992]
  A)
  1-butene done clear
  B)
  2-butene done clear
  C)
  1-pentene done clear
  D)
  2-pentene done clear
  View Solution play_arrow

• question_answer60)
  Bond length between carbon-carbon in ethylene molecule is [MP PET 1997]
  A)
  \[1.54\overset{\circ }{\mathop{\text{A}}}\,\] done clear
  B)
  \[1.35\overset{\circ }{\mathop{\text{A}}}\,\] done clear
  C)
  \[1.19\overset{\circ }{\mathop{\text{A}}}\,\] done clear
  D)
  \[2.4\overset{\circ }{\mathop{\text{A}}}\,\] done clear
  View Solution play_arrow

• question_answer61)
  The compound having both sp and \[s{{p}^{2}}\] hybridised carbon atom is [IIT-JEE 1981]
  A)
  Propene done clear
  B)
  Propyne done clear
  C)
  Propadiene done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer62)
  The halogen which is most reactive in the halogenation of alkenes under sunlight is [IIT-JEE 1981]
  A)
  Chlorine done clear
  B)
  Bromine done clear
  C)
  Iodine done clear
  D)
  All equal done clear
  View Solution play_arrow

• question_answer63)
  When ethene reacts with bromine, it forms [AFMC 2000; KCET 2001]
  A)
  Chloroethane done clear
  B)
  Ethylene dibromide done clear
  C)
  1 bromopropane done clear
  D)
  1,2-dichloroethene done clear
  View Solution play_arrow

• question_answer64)
  Paraffins are soluble in [NCERT 1978]
  A)
  Distilled water done clear
  B)
  Benzene done clear
  C)
  Methanol done clear
  D)
  Sea water done clear
  View Solution play_arrow

• question_answer65)
  Addition of HCl to propene in presence of peroxides gives [BHU 1981, 98]
  A)
  1-Chloropropane done clear
  B)
  2-Chloropropane done clear
  C)
  3-Chloropropane done clear
  D)
  Propene dichloride done clear
  View Solution play_arrow

• question_answer66)
  The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst is [KCET 2000]
  A)
  Isopropyl iodide done clear
  B)
  2-Iodopropene done clear
  C)
  2-Iodopropane done clear
  D)
  1-Iodopropane done clear
  View Solution play_arrow

• question_answer67)
  In the reaction \[{{C}_{2}}{{H}_{5}}CH=C{{H}_{2}}+H-X\to \] Product. What is the product  [BHU 2002]
  A)
  \[{{C}_{2}}{{H}_{5}}-C{{H}_{3}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{5}}C{{H}_{2}}-C{{H}_{2}}X\] done clear
  C)
  \[{{C}_{2}}{{H}_{5}}-CHX-C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}X-CH=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer68)
  Alkene can be prepared from alkyl halide by the following reagent \[R-X+N{{u}^{-}}\to \text{Alkene}+NuH\] [RPET 2000]
  A)
  Alc. KOH + heat done clear
  B)
  Aq. KOH + cold water done clear
  C)
  NaOH done clear
  D)
  LiOH done clear
  View Solution play_arrow

• question_answer69)
  2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is [RPET 1999; AMU 2000]
  A)
  1-Butene done clear
  B)
  1-Butyne done clear
  C)
  2-Butene done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer70)
  Ethylene has high b.p. and high vapour pressure at \[{{100}^{o}}C\] and does not dissolve in water. Hence ethylene is separated by this method [UPSEAT 1999]
  A)
  Simple distillation done clear
  B)
  Vacuum distillation done clear
  C)
  Vapour distillation done clear
  D)
  Alkali treatment done clear
  View Solution play_arrow

• question_answer71)
  Addition of bromine to 1, 3-butadiene gives [AMU 1999]
  A)
  1, 4-addition product only done clear
  B)
  1, 2-addition product only done clear
  C)
  Both 1, 2-and 1, 4 addition product done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer72)
  In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti-Markovnikoff?s addition to alkenes because [IIT-JEE Screening 2001]
  A)
  Both are highly ionic done clear
  B)
  One is oxidising and the other is reducing done clear
  C)
  One of the steps is endothermic in both the cases done clear
  D)
  All the steps are exothermic in both the cases done clear
  View Solution play_arrow

• question_answer73)
  The compound most likely to decolourize a solution of potassium permanganate is [NCERT 1978]
  A)
  \[C{{H}_{3}}C{{H}_{3}}\] done clear
  B)
  done clear
  C)
  \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\] done clear
  D)
  \[\underset{\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C{{H}_{3}}-C-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  View Solution play_arrow

• question_answer74)
  Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X [UPSEAT 2003]
  A)
  \[B{{r}_{2}}\] done clear
  B)
  HBr done clear
  C)
  HCl done clear
  D)
  HCN done clear
  View Solution play_arrow

• question_answer75)
  Addition of HCl does not obey antimarkownikoff?s rule because [UPSEAT 2003]
  A)
  It is a strong acid done clear
  B)
  It is a gas done clear
  C)
  Its bond energy is high done clear
  D)
  Its bond energy is less done clear
  View Solution play_arrow

• question_answer76)
  Correct statement about1, 3-dibutene [UPSEAT 2003]
  A)
  Conjugated double bonds are present done clear
  B)
  Reacts with HBr done clear
  C)
  Forms polymer done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer77)
  At low temperatures, the slow addition of molecular bromine to \[C{{H}_{2}}=CH-C{{H}_{2}}-C\equiv CH\] gives [Roorkee Qualifying 1998]
  A)
  \[C{{H}_{2}}=CH-C{{H}_{2}}-CBr=CHBr\] done clear
  B)
  \[BrC{{H}_{2}}-CHBr-C{{H}_{2}}-C\equiv CH\] done clear
  C)
  \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-CB{{r}_{3}}\] done clear
  D)
  \[C{{H}_{3}}-CB{{r}_{2}}-C{{H}_{2}}-C\equiv CH\] done clear
  View Solution play_arrow

• question_answer78)
  \[PC{{l}_{5}}\]reacts with propanone, to give [Pb. PMT 2001]
  A)
  vic-dichloride done clear
  B)
  Propanal done clear
  C)
  propane-chloride done clear
  D)
  gem-dichloride done clear
  View Solution play_arrow

• question_answer79)
  The compounds that will give an isomer of 2; 2-dimethyl propane on catalytic hydrogenation are [AMU 1999] (1) \[C{{H}_{3}}CH=\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C\,\,-\,\,}}\,}}\,C{{H}_{3}}\] (2) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] (3) \[\overset{\begin{smallmatrix}  \,\,\,\,\,\,\,\,\,\,\,\,\begin{matrix}    {} & H  \\ \end{matrix} \\  \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,| \end{smallmatrix}}{\mathop{C{{H}_{3}}C}}\,=CHC{{H}_{2}}C{{H}_{3}}\] (4) \[C{{H}_{3}}\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{C\,\,\,}}\,=}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{C\,}}\,-}}\,C{{H}_{3}}\]
  A)
  1 and 4 done clear
  B)
  2 and 4 done clear
  C)
  1 and 3 done clear
  D)
  1 and 2 done clear
  View Solution play_arrow

• question_answer80)
  Alkene \[R-C-H=C{{H}_{2}}\] reacts readily with \[{{B}_{2}}{{H}_{56}}\] and the product on oxidation with alkaline hydrogen peroxides produces [CBSE PMT 1995]
  A)
  \[R-C{{H}_{2}}-CHO\] done clear
  B)
  \[R-C{{H}_{2}}-C{{H}_{2}}-OH\] done clear
  C)
  \[\underset{O}{\mathop{\underset{||}{\mathop{R-C-C{{H}_{3}}}}\,}}\,\] done clear
  D)
  \[\underset{\,\,\,\,\,\,OH\,\,\,\,OH}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{R-CH-C{{H}_{3}}}}\,}}\,\] done clear
  View Solution play_arrow

• question_answer81)
  Bayer?s reagent is used for detection of [RPMT 2002]
  A)
  Amines done clear
  B)
  Glucose done clear
  C)
  Unsaturated bond done clear
  D)
  Alcohol done clear
  View Solution play_arrow

• question_answer82)
  Which of the following is(are) example(s) of nucleophilic addition reaction in case of acetylene
  A)
  Addition of water done clear
  B)
  Addition of HCN done clear
  C)
  Addition of \[AsC{{l}_{3}}\] done clear
  D)
  All done clear
  View Solution play_arrow

• question_answer83)
  Structural formula for lewisite is
  A)
  \[\begin{align}   & CHCl \\  & \text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ } \\  & CHAsC{{l}_{3}} \\ \end{align}\] done clear
  B)
  \[\begin{align}   & CHC{{l}_{2}} \\  & \text{ }\!\!|\!\!\text{ } \\  & CHAsC{{l}_{3}} \\ \end{align}\] done clear
  C)
  \[\begin{align}   & CHCl \\  & || \\  & CHAsC{{l}_{2}} \\ \end{align}\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer84)
  Propene when heated with chlorine at about \[{{500}^{o}}C\] forms [MP PET 1997]
  A)
  \[C{{H}_{2}}Cl.CH=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}.CHCl.C{{H}_{2}}Cl\] done clear
  C)
  \[C{{H}_{2}}Cl.CHCl.C{{H}_{2}}Cl\] done clear
  D)
  All the three done clear
  View Solution play_arrow

• question_answer85)
  PVC is obtained from vinyl chloride by a reaction called
  A)
  Addition done clear
  B)
  Isomerization done clear
  C)
  Polymerization done clear
  D)
  Substitution done clear
  View Solution play_arrow

• question_answer86)
  Reaction of \[B{{r}_{2}}\] on ethylene in presence of \[NaCl\] gives
  A)
  \[BrC{{H}_{2}}-C{{H}_{2}}Br\] done clear
  B)
  \[ClC{{H}_{2}}-C{{H}_{2}}Br\] done clear
  C)
  Both A and B done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer87)
  \[C{{H}_{3}}-CH=C{{H}_{2}}+HBr\xrightarrow{{}}...........,\] the product formed is [AIIMS 1983; CPMT 1997; RPMT 1999, 2003]
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-Br\] done clear
  B)
  \[C{{H}_{3}}-CHBr-C{{H}_{3}}\] done clear
  C)
  \[BrC{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  D)
  \[C{{H}_{2}}=C=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer88)
  The product of reaction between propene and HBr in the presence of a peroxide is
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}Br\] done clear
  B)
  \[C{{H}_{3}}-CHBr-C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}Br\] done clear
  D)
  \[C{{H}_{3}}-CH=CHBr\] done clear
  View Solution play_arrow

• question_answer89)
  Ozonolysis of 2-methyl butene-2 yields
  A)
  Only aldehyde done clear
  B)
  Only ketone done clear
  C)
  Both aldehyde and ketone done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer90)
  The final product formed by the ozonolysis of compound \[RCH=C{{R}_{2}}\] is [NCERT 1978]
  A)
  RCHO done clear
  B)
  \[{{R}_{2}}CO\] done clear
  C)
  Both A and B done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer91)
  Which one is an unsaturated compound [BIT 1990]
  A)
  \[{{C}_{6}}{{H}_{14}}\] done clear
  B)
  \[{{C}_{4}}{{H}_{8}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{7}}OH\] done clear
  D)
  \[C{{H}_{3}}OH\] done clear
  View Solution play_arrow

• question_answer92)
  Ethyl alcohol on heating with conc. \[{{H}_{2}}S{{O}_{4}}\] gives [EAMCET 1979; MP PMT 1996]
  A)
  \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer93)
  Monohalides on reacting with alcoholic KOH give [MP PET 1982, 86; DPMT 1981; CPMT 1979, 83]
  A)
  Alkanes done clear
  B)
  Alkenes done clear
  C)
  Alkynes done clear
  D)
  Aromatic hydrocarbons done clear
  View Solution play_arrow

• question_answer94)
  Ethylene is a member of..... series [BHU 1979]
  A)
  Alkyne done clear
  B)
  Olefin done clear
  C)
  Paraffin done clear
  D)
  Amine done clear
  View Solution play_arrow

• question_answer95)
  In a double bond between two carbon atoms of ethene, there are [NCERT 1981]
  A)
  Two sigma bonds perpendicular to each other done clear
  B)
  One sigma and one pi bond done clear
  C)
  Two pi bonds perpendicular to each other done clear
  D)
  Two pi bonds at an angle of \[{{60}^{o}}\] done clear
  View Solution play_arrow

• question_answer96)
  The formation of alkene from alkyl halide is an example of [CPMT 1983; AMU 1982; Pb. CET 1986]
  A)
  Addition done clear
  B)
  Elimination done clear
  C)
  Substitution done clear
  D)
  A and C done clear
  View Solution play_arrow

• question_answer97)
  In the following reaction \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\underset{475K}{\mathop{\xrightarrow{{{H}_{2}}S{{O}_{4}}}}}\,\] [AIIMS 1983]
  A)
  \[C{{H}_{3}}CH=CHC{{H}_{3}}\] predominates done clear
  B)
  \[C{{H}_{2}}=CHC{{H}_{2}}C{{H}_{3}}\] predominates done clear
  C)
  Both are formed in equal amounts done clear
  D)
  The amount of production depends on the nature of catalyst done clear
  View Solution play_arrow

• question_answer98)
  The compound B formed in the following sequences of reactions is \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\xrightarrow{PC{{l}_{3}}}A\xrightarrow{Alco.\text{ }KOH}B\] [NCERT 1981]
  A)
  Propyne done clear
  B)
  Propene done clear
  C)
  Propanol done clear
  D)
  Propane done clear
  View Solution play_arrow

• question_answer99)
  n-propyl bromide on treatment with ethanolic potassium hydroxide produces [IIT-JEE 1987; MP PMT 1997]
  A)
  Propane done clear
  B)
  Propene done clear
  C)
  Propyne done clear
  D)
  Propanol done clear
  View Solution play_arrow

• question_answer100)
  The dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly gives [IIT-JEE (Screening) 1990; MP PET 1993]
  A)
  2-methyl-1-butene done clear
  B)
  2-methyl-2-butene done clear
  C)
  2, 2-dimethyl-1-butene done clear
  D)
  2-butene done clear
  View Solution play_arrow

• question_answer101)
  Which is the most reactive hydrocarbon in the following [JIPMER 2002]
  A)
  Ethane done clear
  B)
  Ethyne done clear
  C)
  Ethene done clear
  D)
  Methane done clear
  View Solution play_arrow

• question_answer102)
  Shape of ethylene molecule is [MP PET 1993]
  A)
  Tetrahedral done clear
  B)
  Pyramidal done clear
  C)
  Planar done clear
  D)
  Linear done clear
  View Solution play_arrow

• question_answer103)
  Electrophilic addition on a carbon-carbon double bond involves the intermediate formation of a more stable carbocation. This statement is called
  A)
  Saytzeff's rule done clear
  B)
  Baeyer's effect done clear
  C)
  Markownikoff's rule done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer104)
  \[C{{H}_{2}}=CHCl\] reacts with HCl to form [CPMT 1985, 93]
  A)
  \[C{{H}_{2}}Cl-C{{H}_{2}}Cl\] done clear
  B)
  \[C{{H}_{3}}-CHC{{l}_{2}}\] done clear
  C)
  \[C{{H}_{2}}=CHCl.HCl\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer105)
  Deviation from Markownikoff's rule occurs in presence of
  A)
  Zinc done clear
  B)
  Peroxides done clear
  C)
  \[Hg-Zn/HCl\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer106)
  Presence of peroxides affects the addition of [BHU 1987]
  A)
  HBr done clear
  B)
  HCl done clear
  C)
  HI done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer107)
  Catalyst used in dimerisation of acetylene to prepare chloroprene is [BHU 1984]
  A)
  \[HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\] done clear
  B)
  \[C{{u}_{2}}C{{l}_{2}}\] done clear
  C)
  \[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}Cl\] done clear
  D)
  \[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\] done clear
  View Solution play_arrow

• question_answer108)
  Chloroprene is
  A)
  2-chloro-1, 3-butadiene done clear
  B)
  3-chloro-2, 3-butadiene done clear
  C)
  2, 3-dichlorobutadiene done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer109)
  Chloroprene is used in making [MP PET 1985]
  A)
  Synthetic rubber done clear
  B)
  Plastic done clear
  C)
  Petrol done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer110)
  When isobutyl magnesium bromide in dry ether is treated with absolute ethyl alcohol, the products formed are [IIT-JEE 1995]
  A)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}OH}}\,}}\,\] and \[C{{H}_{3}}C{{H}_{2}}MgBr\] done clear
  B)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] and \[Mg(OH)Br\] done clear
  C)
  \[\underset{C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,}}\,\] and \[C{{H}_{3}}-C{{H}_{2}}OMgBr\] done clear
  D)
  \[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,}}\,,C{{H}_{2}}=C{{H}_{2}}\] and \[Mg(OH)Br\] done clear
  View Solution play_arrow

• question_answer111)
  The predominant product formed, when 3-methyl-2-pentene reacts with HOCl, is [IIT-JEE 1995]
  A)
  \[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,OH}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  B)
  \[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,Cl}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  C)
  \[\underset{\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}\,Cl}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,OH}{\mathop{\overset{\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  D)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,OH}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  View Solution play_arrow

• question_answer112)
  Which of the following occurs easily in ethylene [MNR 1987; NCERT 1979]
  A)
  Addition done clear
  B)
  Substitution done clear
  C)
  Elimination done clear
  D)
  Rearrangement done clear
  View Solution play_arrow

• question_answer113)
  How many gm of bromine will react with 21 gm \[{{C}_{3}}{{H}_{6}}\] [MP PET 1985]
  A)
  80 done clear
  B)
  160 done clear
  C)
  240 done clear
  D)
  320 done clear
  View Solution play_arrow

• question_answer114)
  Conjugate double bond is present in [MP PMT 1987]
  A)
  Propylene done clear
  B)
  Butadiene done clear
  C)
  Isobutylene done clear
  D)
  Butylene done clear
  View Solution play_arrow

• question_answer115)
  On passing vapours of an organic liquid over finely divided Cu at \[573K\] the product was an alkene. This reaction is
  A)
  Catalytic oxidation of primary alcohol done clear
  B)
  Catalytic dehydrogenation of secondary alcohol done clear
  C)
  Catalytic dehydrogenation of tertiary alcohol done clear
  D)
  Catalytic dehydration of tertiary alcohol done clear
  View Solution play_arrow

• question_answer116)
  The total number of sigma\[\sigma \] and pi\[(\pi )\] bonds in an ethylene molecule are
  A)
  \[4\sigma ,2\pi \] done clear
  B)
  \[4\sigma ,1\pi \] done clear
  C)
  \[5\sigma ,2\pi \] done clear
  D)
  \[5\sigma ,1\pi \] done clear
  View Solution play_arrow

• question_answer117)
  Cyclic hydrocarbon molecule A has all the carbon and hydrogens in a single plane. All the carbon-carbon bonds are of same length and less that 1.54 Å but more than 1.34 Å. \[C-C-C\] bond angle will be [CBSE PMT 1989]
  A)
  \[{{120}^{o}}\] done clear
  B)
  \[{{180}^{o}}\] done clear
  C)
  \[{{100}^{o}}\] done clear
  D)
  \[{{109}^{o}}2{8}'\] done clear
  View Solution play_arrow

• question_answer118)
  General formula of alkenes is [CPMT 1975, MNR 1987; NCERT 1987; MP PMT 1994]
  A)
  \[{{C}_{n}}{{H}_{2n}}\] done clear
  B)
  \[{{C}_{n}}{{H}_{2n-2}}\] done clear
  C)
  \[{{C}_{n}}{{H}_{2n+2}}\] done clear
  D)
  \[{{C}_{n}}{{H}_{2n-1}}\] done clear
  View Solution play_arrow

• question_answer119)
  The product of following reaction is \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH=C{{H}_{2}}}}\,}}\,}}\,}}\,\underset{\text{(ii) }NaB{{H}_{4}}}{\mathop{\xrightarrow{(i)\text{ }Hg{{(OAc)}_{2}};{{H}_{2}}O}}}\,\] [MP PMT 1986; MP PET 1997]
  A)
  \[\underset{C{{H}_{3}}\,OH}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,}{\mathop{\overset{C{{H}_{2}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{2}}}}\,}}\,}}\,}}\,\] done clear
  B)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}OH}}\,}}\,}}\,}}\,\] done clear
  C)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,OH\,C{{H}_{3}}}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  D)
  \[\underset{C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{HOC{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}}}\,}}\,}}\,}}\,\] done clear
  View Solution play_arrow

• question_answer120)
  Which one of the following organic compounds decolourizes an alkaline \[KMn{{O}_{4}}\] solution [CPMT 1987, 93]
  A)
  \[C{{S}_{2}}\] done clear
  B)
  \[{{C}_{3}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{8}}\] done clear
  D)
  \[C{{H}_{3}}OH\] done clear
  View Solution play_arrow

• question_answer121)
  Decolourization of alkaline \[KMn{{O}_{4}}\] is used as a test for [AMU 1983]
  A)
  Aromatic hydrocarbons done clear
  B)
  Olefinic hydrocarbons done clear
  C)
  Acetylenic hydrocarbons done clear
  D)
  Cycloalkanes done clear
  View Solution play_arrow

• question_answer122)
  The reaction \[C{{H}_{2}}=C{{H}_{2}}+{{H}_{2}}\underset{250-{{300}^{o}}C}{\mathop{\xrightarrow{Ni}}}\,C{{H}_{3}}-C{{H}_{3}}\] is called [MP PMT 1996; CBSE PMT 2001; MH CET 2001;BHU 2002]
  A)
  Wurtz's reaction done clear
  B)
  Kolbe's reaction done clear
  C)
  Sabatier and Senderen's reaction done clear
  D)
  Carbylamine reaction done clear
  View Solution play_arrow

• question_answer123)
  The alkene which on ozonolysis yields acetone is [MP PMT 1986, 2000]
  A)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\] done clear
  C)
  \[{{(C{{H}_{3}})}_{2}}C=C{{(C{{H}_{3}})}_{2}}\] done clear
  D)
  \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer124)
  \[C{{H}_{3}}CH=CHCHO\] is oxidized to \[C{{H}_{3}}CH=CHCOOH\] using [NCERT 1978]
  A)
  Alkaline potassium permanganate done clear
  B)
  Acidified potassium permanganate done clear
  C)
  Selenium dioxide done clear
  D)
  Osmium tetroxide done clear
  View Solution play_arrow

• question_answer125)
  The order of increasing reactivity towards HCl of the following compounds will be (1) \[C{{H}_{2}}=C{{H}_{2}}\] (2) \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] [MP PET 1994]
  A)
  \[1<2<3\] done clear
  B)
  \[1<3<2\] done clear
  C)
  \[3<2<1\] done clear
  D)
  \[2<1<3\] done clear
  View Solution play_arrow

• question_answer126)
  The reagent which is used to distinguish between propene and propyne is [MP PET 1994; IIT-JEE (Screening) 2000;  AIIMS 2000; Pb. PMT 2002; BHU 2003]
  A)
  Bromine done clear
  B)
  Alkaline \[KMn{{O}_{4}}\] done clear
  C)
  Ammoniacal \[AgN{{O}_{3}}\] done clear
  D)
  Ozone done clear
  View Solution play_arrow

• question_answer127)
  Which one of the following reactions would be the best for the formation of 2-bromobutane [MP PET 1994] (1) \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\xrightarrow{HBr}\] (2) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{B{{r}_{2}}}\] (4) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\underset{\text{Peroxide}}{\mathop{\xrightarrow{HBr}}}\,\]
  A)
  1 done clear
  B)
  2 done clear
  C)
  3 done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer128)
  If HCl is added over \[C{{H}_{2}}=C<\begin{matrix}    C{{H}_{3}}  \\    C{{H}_{3}}  \\ \end{matrix}\] then what is formed [CPMT 1996]
  A)
  \[\underset{Cl\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix}    C{{H}_{3}}  \\    C{{H}_{3}}  \\ \end{matrix}\] done clear
  B)
  \[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,-CH<-\begin{matrix}    Cl  \\    C{{H}_{3}}  \\    C{{H}_{3}}  \\ \end{matrix}\] done clear
  C)
  \[\]\[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix}    C{{H}_{3}}  \\    C{{H}_{2}}Cl  \\ \end{matrix}\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer129)
  Position of double bond in an organic compound is determined by [DCE 2001; RPMT 2002]
  A)
  Ozonolysis done clear
  B)
  Oxidation done clear
  C)
  Reduction done clear
  D)
  Hydrogenation done clear
  View Solution play_arrow

• question_answer130)
  A gas decolourises Bayer's reagent but does not react with Tollen's reagent, this gas is [MP PMT 2001]
  A)
  Ethene done clear
  B)
  Ethyne done clear
  C)
  Ethane done clear
  D)
  Methane done clear
  View Solution play_arrow

• question_answer131)
  Formation of 2-butene from 2-bromobutane is according to
  A)
  Markowikoff's done clear
  B)
  Bayer done clear
  C)
  Saytzeff done clear
  D)
  Wurtz done clear
  View Solution play_arrow

• question_answer132)
  An alkene on ozonolysis gave acetaldehyde the alkene is
  A)
  Ethylene done clear
  B)
  Propene done clear
  C)
  1-butene done clear
  D)
  2-­butene done clear
  View Solution play_arrow

• question_answer133)
  Indicate the organic structure for the product expected when 2-methyl propene is heated with acetyl chloride in presence of anhydrous zinc chloride [CBSE PMT 1989]
  A)
  \[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  B)
  \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done clear
  C)
  \[\overset{\,\,O}{\mathop{\overset{\,||}{\mathop{C{{H}_{3}}-C-O-C}}\,}}\,<-\begin{matrix}    Me  \\    Me  \\    Me  \\ \end{matrix}\] done clear
  D)
  \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,}{\mathop{C=}}\,}}\,C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer134)
  The reaction \[\underset{OH}{\mathop{\underset{|\,}{\mathop{\overset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{\,|}{\mathop{C{{H}_{3}}-C-C{{H}_{3}}}}\,}}\,}}\,}}\,\xrightarrow{{{H}_{2}}S{{O}_{4}}}\overset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{\,|}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,}}\,\] is the example of [AMU 1983]
  A)
  Sulphonation done clear
  B)
  Dehydration done clear
  C)
  Alkylation done clear
  D)
  Decomposition done clear
  View Solution play_arrow

• question_answer135)
  Olefins can be hydrogenated by [AIIMS 1991]
  A)
  Zinc and \[HCl\] done clear
  B)
  Nascent hydrogen done clear
  C)
  Raney Ni and \[{{H}_{2}}\] done clear
  D)
  Lithium hydride in ether done clear
  View Solution play_arrow

• question_answer136)
  Electrolysis of cold concentrated aqueous solution of potassium succinate yields [CPMT 1985; MP PMT 1986]
  A)
  Ethane done clear
  B)
  Ethyne done clear
  C)
  Ethene done clear
  D)
  Ethane-1, 2-diol done clear
  View Solution play_arrow

• question_answer137)
  A hydrocarbon containing 2 carbon atoms gives Sabatier and Senderen's reaction but does not give precipitate with ammoniacal silver nitrate solution. The hydrocarbon in the question is [MADT Bihar 1983]
  A)
  Ethane done clear
  B)
  Acetylene done clear
  C)
  Ethylene done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer138)
  The reaction \[C{{H}_{2}}=CH-C{{H}_{3}}+HBr\to C{{H}_{3}}CHBr-C{{H}_{3}}\] is [CBSE PMT 1996]
  A)
  Nucleophilic addition done clear
  B)
  Electrophilic addition done clear
  C)
  Electrophilic substitution done clear
  D)
  Free radical addition done clear
  View Solution play_arrow

• question_answer139)
  What is the product of the reaction of 1, 3-butadiene with Br2  [Orissa JEE 2003]
  A)
  1,4 -dibromobutene done clear
  B)
  1,2 -dibromobutene done clear
  C)
  3,4-dibromobutene done clear
  D)
  2,3-dibromo-2-butene done clear
  View Solution play_arrow

• question_answer140)
  An alkene given two moles of HCHO, one mole of \[C{{O}_{2}}\]and one mole of \[C{{H}_{3}}COCHO\]on ozonolysis. What is its structure [Orissa JEE 2003]
  A)
  \[C{{H}_{2}}=C=CH-C{{H}_{2}}-C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{2}}=CH-\overset{C{{H}_{3}}}{\mathop{\overset{\,\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH\,-}}\,}}\,CH=C{{H}_{2}}\] done clear
  C)
  \[C{{H}_{2}}=C=\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{C\,-\,}}\,}}\,C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{2\,}}=C=\overset{C{{H}_{3}}}{\mathop{\,\overset{|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C\,\,\,-\,}}\,}}\,CH=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer141)
  In the reaction \[C{{H}_{3}}CH=C{{H}_{2}}+{{H}_{2}}O+[O]\underset{Acid}{\mathop{\xrightarrow{KMn{{O}_{4}}}}}\,\]\[C{{H}_{3}}-\underset{OH\,\,}{\mathop{\underset{|}{\mathop{C}}\,H}}\,\,-\underset{\,OH\,\,\,\,\,\,}{\mathop{\underset{|}{\mathop{C}}\,{{H}_{2}}}}\,\,\,\xrightarrow{[O]}X+HCOOH\] X is [MP PMT 2002]
  A)
  \[C{{H}_{3}}C{{H}_{2}}COOH\] done clear
  B)
  \[C{{H}_{3}}COOH\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}CHO\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}OH\] done clear
  View Solution play_arrow

• question_answer142)
  Which of the following alkenes gives only acetic acid and on oxidation with potassium permanganate solution [MP PET 2003]
  A)
  Ethylene done clear
  B)
  1-Butene done clear
  C)
  Propene done clear
  D)
  2-Butene done clear
  View Solution play_arrow

• question_answer143)
  Butene-1 may be converted to butane by reaction with [AIEEE 2003]
  A)
  Zn-HCl done clear
  B)
  Sn-HCl done clear
  C)
  Zn-Hg done clear
  D)
  Pd/\[{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer144)
  sThe major product formed when propene reacts with HBr in presence of peroxides is [NCERT 1980; CBSE PMT 1989]
  A)
  n-propyl bromide done clear
  B)
  Isopropyl bromide done clear
  C)
  n-propyl alcohol done clear
  D)
  1, 3-dibromopropane done clear
  View Solution play_arrow

• question_answer145)
  Ethyl hydrogen sulphate is obtained by the reaction of \[{{H}_{2}}S{{O}_{4}}\] on [CPMT 1985]
  A)
  Ethylene done clear
  B)
  Ethane done clear
  C)
  Ethyl chloride done clear
  D)
  Ethanol done clear
  View Solution play_arrow

• question_answer146)
  Ethylene reacts with ozone to give [DPMT 1981]
  A)
  Formaldehyde done clear
  B)
  Ethyl alcohol done clear
  C)
  Ozonide done clear
  D)
  Acetaldehyde done clear
  View Solution play_arrow

• question_answer147)
  Which of the following aliphatic compounds will discharge red colour of bromine
  A)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  B)
  \[{{C}_{3}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{4}}{{H}_{8}}\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer148)
  Chlorination can be done on
  A)
  \[C{{H}_{3}}-CH=C{{h}_{2}}\] done clear
  B)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  C)
  CH º CH done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer149)
  Addition of HI on the double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product. This is because the addition proceeds through [CPMT 1988]
  A)
  A more stable carbonium ion done clear
  B)
  A more stable carbanion done clear
  C)
  A more stable free radical done clear
  D)
  None of the above being a concerted reaction done clear
  View Solution play_arrow

• question_answer150)
  When butene-1 is mixed with excess of bromine, the expected reaction product is [CPMT 1974; BHU 1980]
  A)
  1, 2-dibromobutane done clear
  B)
  1, 1-dibromobutane done clear
  C)
  2, 2-dibromobutane done clear
  D)
  Perbromobutane done clear
  View Solution play_arrow

• question_answer151)
  A compound ?X? on ozonolysis forms two molecules of HCHO. Compound ?X? is [AIIMS 1987; CPMT 1993]
  A)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  D)
  \[{{C}_{6}}{{H}_{6}}\] done clear
  View Solution play_arrow

• question_answer152)
  For the reaction \[C{{H}_{3}}-CH=C{{H}_{2}}+HOCl\to A\] the product A is [Orissa JEE  2002]
  A)
  \[C{{H}_{3}}-CHCl-C{{H}_{2}}OH\] done clear
  B)
  \[C{{H}_{3}}-\underset{OH}{\mathop{\underset{\,|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-Cl\] done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-COCl\] done clear
  D)
  \[C{{H}_{3}}-\underset{\,OH\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,Cl\,\,\,\,}{\mathop{\overset{|}{\mathop{C}}\,\,\,-}}\,}}\,}}\,C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer153)
  \[{{(C{{H}_{3}})}_{2}}C=\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{CH}}\,\underset{{{H}_{2}}}{\mathop{\xrightarrow{\text{Catalyst}}}}\,\]Optical isomers [BHU 2003]
  A)
  2 done clear
  B)
  4 done clear
  C)
  Zero done clear
  D)
  3 done clear
  View Solution play_arrow

• question_answer154)
  Isobutene \[+HBr\,\,\xrightarrow[\text{Peroxide}]{}\]  product is [BHU 2003]
  A)
  Tertiary butyl bromide done clear
  B)
  Isobutyl bromide done clear
  C)
  Tertiary butyl alcohol done clear
  D)
  Isobutyl alcohol done clear
  View Solution play_arrow

• question_answer155)
  Which of the following represents the given mode of hybridisation sp2_ sp2_ sp-sp from left to right  [IIT-JEE (Screening) 2003]
  A)
  \[{{H}_{2}}C=CH-C\equiv CH\] done clear
  B)
  \[HC\equiv C-C\equiv CH\] done clear
  C)
  \[{{H}_{2}}C=C=C=C{{H}_{2}}\] done clear
  D)
    done clear
  View Solution play_arrow

• question_answer156)
  ?The negative part of addenda adds on to the carbon atom linked with least number of hydrogen atoms?. This statement is called [DPMT 1982; AIIMS 1988; AFMC 2004]
  A)
  Thiele's principle done clear
  B)
  Bayer's strain theory done clear
  C)
  Markownikoff's rule done clear
  D)
  Peroxide effect done clear
  View Solution play_arrow

• question_answer157)
  The product obtained, heating ethanol with conc. \[{{H}_{2}}S{{O}_{4}}\]at \[{{165}^{o}}-{{170}^{o}}\], is [MP PMT 2003]
  A)
  \[{{({{C}_{2}}{{H}_{5}})}_{2}}S{{O}_{4}}\] done clear
  B)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  C)
  \[C{{H}_{3}}COOH\] done clear
  D)
  \[{{C}_{2}}{{H}_{5}}HS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer158)
  Which of the following is the most stable
  A)
  1-butene done clear
  B)
  2-butene done clear
  C)
  1-pentene done clear
  D)
  2-pentene done clear
  View Solution play_arrow

• question_answer159)
  Which doesn?t follow Markownikoff?s rule [JEE Orissa 2004; MP PMT 2004; BCECE 2005]
  A)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}CH=CHC{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}-\underset{C{{H}_{3}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,CH=C{{H}_{2}}\] done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer160)
  The product of acid catalyzed hydration of 2-phenyl propene is [IIT JEE (Screening) 2004]
  A)
  3-phenyl-2-propanol done clear
  B)
  1-phenyl-2-propanol done clear
  C)
  2-phenyl-2-propanol done clear
  D)
  2-phenyl-1-propanol done clear
  View Solution play_arrow

• question_answer161)
  A reagent used to test for unsaturation of allkene is [BHU 2004]
  A)
  conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  B)
  Ammonical \[C{{u}_{2}}C{{l}_{2}}\] done clear
  C)
  Ammonical \[AgN{{O}_{3}}\] done clear
  D)
  Solution of \[B{{r}_{2}}\]in \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer162)
  Propylene on hydrolysis with sulphuric acid forms   [MH CET-2003]
  A)
  n-propyl alcohol done clear
  B)
  Isopropyl alcohol done clear
  C)
  Ethyl alcohol done clear
  D)
  Butyl alcohol done clear
  View Solution play_arrow

• question_answer163)
  An alkene, on ozonolysis gives formaldehyde and acetaldehyde. The alkene is : [BVP 2004]
  A)
  Ethene done clear
  B)
  Propene done clear
  C)
  Butene-1 done clear
  D)
  Butene-2 done clear
  View Solution play_arrow

• question_answer164)
  In the reaction, \[{{H}_{2}}C=C{{H}_{2}}\xrightarrow{\begin{smallmatrix}  \text{cold alkaline} \\  \text{KMn}{{\text{O}}_{\text{4}}} \end{smallmatrix}}(A)\]: Product A is : [Pb. CET 2000]
  A)
  Ethylene glycol done clear
  B)
  Acetic acid done clear
  C)
  Ethane done clear
  D)
  Butyric acid done clear
  View Solution play_arrow

• question_answer165)
  Using anhydrous \[AlC{{l}_{3}}\] as catalyst, which one of the following reaction produces ethylbenzene \[(PhEt)\] [CBSE PMT 2004]
  A)
  \[{{H}_{2}}C=C{{H}_{2}}+{{C}_{6}}{{H}_{6}}\] done clear
  B)
  \[{{H}_{3}}C-C{{H}_{3}}+{{C}_{6}}{{H}_{6}}\] done clear
  C)
  \[{{H}_{3}}C-C{{H}_{2}}OH+{{C}_{6}}{{H}_{6}}\] done clear
  D)
  \[C{{H}_{3}}-CH=C{{H}_{2}}+{{C}_{6}}{{H}_{6}}\] done clear
  View Solution play_arrow

• question_answer166)
  Which of these does not follow Anti-Markownikoff's rule [Orissa JEE 2005]
  A)
  2-butene done clear
  B)
  1-butene done clear
  C)
  2-pentene done clear
  D)
  2-hexene done clear
  View Solution play_arrow

• question_answer167)
  Reaction of HBr with propene in the presence of peroxide gives [CBSE PMT 2004]
  A)
  Allyl bromide done clear
  B)
  n-propyl bromide done clear
  C)
  Isopropyl bromide done clear
  D)
  3-bromo propane done clear
  View Solution play_arrow

• question_answer168)
  Which of the following react with \[KMn{{O}_{4}}\] but does not react with \[AgN{{O}_{3}}\]? [BCECE 2005]
  A)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  B)
  \[C{{H}_{4}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer169)
  3-Phenylpropene on reaction with HBr gives (as a major product) [AIIMS 2005]
  A)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CH(Br)C{{H}_{3}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{5}}CH(Br)C{{H}_{2}}C{{H}_{3}}\] done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}Br\] done clear
  D)
  \[{{C}_{6}}{{H}_{5}}CH(Br)CH=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer170)
  Reaction of one molecule of \[HBr\] with one molecule of 1,3-butadiene at \[{{40}^{o}}C\] gives predominantly [AIEEE 2005]
  A)
  3-bromobutene under kinetically controlled conditions done clear
  B)
  1-bromo-2-butene under thermodyanamically controlled conditions done clear
  C)
  3-bromobutene under thermodynamically controlled conditions done clear
  D)
  1-bromo-2-butene under kinetically controlled conditions done clear
  View Solution play_arrow

• question_answer171)
  The only alcohol that can be prepared by the indirect hydration of alkene is [AFMC 2005]
  A)
  Ethyl alcohol done clear
  B)
  Propyl alcohol done clear
  C)
  Isobutyl alcohol done clear
  D)
  Methyl alcohol done clear
  View Solution play_arrow

• question_answer172)
  The reaction of HBr with \[\overset{\overset{\,\,\,\,\,\,C{{H}_{3}}}{\mathop{|\,}}\,}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,\] in the presence of peroxide will give [BHU 2005]
  A)
  \[\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}CBrC{{H}_{3}}}}\,\] done clear
  B)
  CH3CH2CH2CH2Br done clear
  C)
  \[\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}CHC{{H}_{2}}Br}}\,\] done clear
  D)
  \[\overset{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}C{{H}_{2}}CHC{{H}_{3}}}}\,\] done clear
  View Solution play_arrow

• question_answer173)
  A gas decolourised by \[KMn{{O}_{4}}\] solution but gives no precipitate with ammoniacal cuprous chloride is [KCET 2005]
  A)
  Ethane done clear
  B)
  Methane done clear
  C)
  Ethene done clear
  D)
  Acetylene done clear
  View Solution play_arrow

• question_answer174)
  Cyclohexene on reaction with \[Os{{O}_{4}}\] followed by reaction with \[NaHS{{O}_{3}}\] gives [Orissa JEE 2005]
  A)
  cis-diol done clear
  B)
  trans-diol done clear
  C)
  epoxy done clear
  D)
  alcohol done clear
  View Solution play_arrow