NEET Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank

done Self Evaluation Test - Haloalkanes and Haloarenes Total Questions - 70

• question_answer1)
  Arrange the following compounds in order of increasing dipole moment:  

  (I) Toluene

  (II) m-dichlorobenzene

  (III) o-dichlorobenzene

  (IV) p-dichlorobenzene

  A)
  \[I<IV<II<III\]               done clear
  B)
  \[IV<I<II<III\] done clear
  C)
  \[IV<I<III<II\]    done clear
  D)
  \[IV<II<I<III\] done clear
  View Solution play_arrow

• question_answer2)
  Pure chloroform is prepared by
  A)
  distilling chloral hydrate with aqueous sodium hydroxide. done clear
  B)
  heating ethanol with bleaching powder. done clear
  C)
  heating acetone with bleaching powder. done clear
  D)
  reducing carbon tetrachloride. done clear
  View Solution play_arrow

• question_answer3)
  The reaction conditions leading to the best yields of \[{{C}_{2}}{{H}_{5}}Cl\] are:
  A)
  \[{{C}_{2}}{{H}_{6}}(excess)+C{{l}_{2}}\xrightarrow{UV\,light}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}+C{{l}_{2}}\xrightarrow[room\text{ }temperature]{dark}\] done clear
  C)
  \[{{C}_{2}}{{H}_{6}}+C{{l}_{2}}(excess)\xrightarrow{UV\,light}\] done clear
  D)
  \[{{C}_{2}}{{H}_{6}}+C{{l}_{2}}\xrightarrow{UV\,light}\] done clear
  View Solution play_arrow

• question_answer4)
  A compound A with molecular formula \[{{C}_{10}}{{H}_{13}}Cl\] gives a white precipitate on adding silver nitrate solution. A on reacting with alcoholic KOH gives compound B as the main product. B on ozonolysis gives C and D. C gives Cannizaro reaction but not aldol condensation. D gives aldol condensation but not Cannizaro reaction. A is:
  A)
  \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-Cl\] done clear
  B)
  \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer5)
  The Wurtz-Fittig reaction involves condensation of
  A)
  two molecules of aryl halides. done clear
  B)
  one molecule of each of aryl-halide and alkyl-halide. done clear
  C)
  one molecule of each of aryl-halide and phenol. done clear
  D)
  two molecules of aralkyl-halides. done clear
  View Solution play_arrow

• question_answer6)
  For the compounds \[C{{H}_{3}}Cl,C{{H}_{3}}Br,C{{H}_{3}}I\] and \[C{{H}_{3}}F,\] the correct order of increasing C-X bond length is:
  A)
  \[C{{H}_{3}}F<C{{H}_{3}}Cl<C{{H}_{3}}Br<C{{H}_{3}}I\] done clear
  B)
  \[C{{H}_{3}}F<C{{H}_{3}}Br<C{{H}_{3}}Cl<C{{H}_{3}}I\] done clear
  C)
  \[C{{H}_{3}}F<C{{H}_{3}}I<C{{H}_{3}}Br<C{{H}_{3}}Cl\] done clear
  D)
  \[C{{H}_{3}}Cl<C{{H}_{3}}Br<C{{H}_{3}}F<C{{H}_{3}}I\] done clear
  View Solution play_arrow

• question_answer7)
  The order of reactivity of the given haloalkanes towards nucleophile is:
  A)
  \[RI>RBr>RCl\]  done clear
  B)
  \[RCl>RBr>RI\] done clear
  C)
  \[RBr>RCl>RI\]   done clear
  D)
  \[RBr>RI>RCl\] done clear
  View Solution play_arrow

• question_answer8)
  \[AgN{{O}_{3}}\] does not give precipitate with chloroform because:
  A)
  \[CHC{{l}_{3}}\] does not ionise in water. done clear
  B)
  \[CHC{{l}_{3}}\] is insoluble in water. done clear
  C)
  \[AgN{{O}_{3}}\] is insoluble in \[CHC{{l}_{3}}\]. done clear
  D)
  \[CHC{{l}_{3}}\] is an organic compound. done clear
  View Solution play_arrow

• question_answer9)
  Consider the following anions.

  When attached to \[s{{p}^{3}}\]-hydridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order:

  A)
  \[I>II>III>IV\]  done clear
  B)
  \[I>II>IV>III\] done clear
  C)
  \[IV>I>II>III\]    done clear
  D)
  \[IV>III>II>I\] done clear
  View Solution play_arrow

• question_answer10)
  \[{{C}_{2}}{{H}_{5}}Br\xrightarrow{AgCN}X\xrightarrow[Zn-Hg/HCl]{Reduction}Y,Here\] Y is
  A)
  Ethyl methyl amine         done clear
  B)
  n-propylamine done clear
  C)
  Isopropylamine               done clear
  D)
  Ethylamine done clear
  View Solution play_arrow

• question_answer11)
  The chief reaction product of reaction between n-butane and bromine at 573K is:
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}Br\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,HBr\] done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}\underset{C{{H}_{2}}Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,HBr\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,Br\] done clear
  View Solution play_arrow

• question_answer12)
  Aryl fluoride may be prepared from arene diazonium chloride using:
  A)
  \[HB{{F}_{4}}/\Delta \] done clear
  B)
  \[HB{{F}_{4}}/NaN{{O}_{2}},Cu,\Delta \] done clear
  C)
  \[CuF/HF\] done clear
  D)
  \[Cu/HF\] done clear
  View Solution play_arrow

• question_answer13)
  When \[C{{H}_{3}}C{{H}_{2}}CHC{{l}_{2}}\] is treated with \[NaN{{H}_{2}}\] product formed is
  A)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-C\equiv CH\] done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer14)
  \[C{{H}_{3}}Br+N{{u}^{-}}\xrightarrow{{}}C{{H}_{3}}-Nu+B{{r}^{-}}\] The decreasing order of the rate of the above reaction with nucleophiles \[\left( N{{u}^{-}} \right)\] A to D is \[[N{{u}^{-}}=(A)Ph{{O}^{-}},(B)Ac{{O}^{-}},(C)H{{O}^{-}},(D)C{{H}_{3}}{{O}^{-}}]\]
  A)
  \[A>B>C>D\]               done clear
  B)
  \[B>D>C>A\] done clear
  C)
  \[~D>C>A>B\]      done clear
  D)
  \[D>C>B>A\] done clear
  View Solution play_arrow

• question_answer15)
  In a nucleophilic substitution reaction: \[R-Br+C{{l}^{-}}\xrightarrow{DMF}R-Cl+Br{{~}^{-}},\] Which one of the following undergoes complete inversion of configuration?        
  A)
  \[{{C}_{6}}{{H}_{5}}CH{{C}_{6}}{{H}_{5}}Br\]       done clear
  B)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\] done clear
  C)
  \[{{C}_{6}}{{H}_{5}}CHC{{H}_{3}}Br\]   done clear
  D)
  \[{{C}_{6}}{{H}_{5}}CC{{H}_{3}}{{C}_{6}}{{H}_{5}}Br\] done clear
  View Solution play_arrow

• question_answer16)
  Which of the following statements is wrong?
  A)
  Ethyl chloride on reduction with Zn-Cu couple and alcohol gives ethane. done clear
  B)
  The reaction of methyl magnesium bromide with acetone gives butanol-2. done clear
  C)
  Alkyl halides follow the following reactivity sequence on reaction with alkenes. \[R-I>R-Br>R-Cl>R-I\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}C{{l}_{2}}\] may exist in two isomeric forms. done clear
  View Solution play_arrow

• question_answer17)
  Rate of \[{{S}_{N}}2\] will be negligible in:
  A)
  done clear
  B)
  done clear
  C)
                         done clear
  D)
  done clear
  View Solution play_arrow

• question_answer18)
  A major component of Borsch reagent is obtained by reacting hydrazine hydrate with which of the following? 
  A)
                    done clear
  B)
  done clear
  C)
     done clear
  D)
  done clear
  View Solution play_arrow

• question_answer19)
  Chlorobenzne reacts with trichloro acetaldehyde in the presence of \[{{H}_{2}}S{{O}_{4}}\] The major product formed is:
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer20)
  The total number of acyclic isomers including the stereoisomers with the molecular formula \[{{C}_{4}}{{H}_{7}}Cl\]
  A)
  11                     done clear
  B)
  12     done clear
  C)
  9                                  done clear
  D)
  10 done clear
  View Solution play_arrow

• question_answer21)
  The major product formed when 1,1,1 -trichloro- propane is treated with aqueous potassium hydroxide is:
  A)
  Propyne             done clear
  B)
  1-Propanol done clear
  C)
  2-Propanol         done clear
  D)
  Propionic acid done clear
  View Solution play_arrow

• question_answer22)
  Which one of the following reagents is not suitable for the elimination reaction?
  A)
  NaI/acetone done clear
  B)
  NaOEt/EtOH done clear
  C)
  \[NaOH/{{H}_{2}}O\] done clear
  D)
  \[NaOH/{{H}_{2}}O-EtOH\] done clear
  View Solution play_arrow

• question_answer23)
  Identify Z in the following serie's \[{{C}_{2}}{{H}_{5}}\xrightarrow{Alc.KOH}X\xrightarrow{B{{r}_{2}}}Y\xrightarrow{KCN}Z\]
  A)
  \[C{{H}_{3}}C{{H}_{2}}CN\]              done clear
  B)
  \[NCC{{H}_{2}}-C{{H}_{2}}CN\] done clear
  C)
  \[BrC{{H}_{2}}-C{{H}_{2}}CN\] done clear
  D)
  \[BrCH=CHCN\] done clear
  View Solution play_arrow

• question_answer24)
  Among the following, the molecule with the lowest dipole moment is
  A)
  \[CHC{{l}_{3}}\]          done clear
  B)
  \[C{{H}_{3}}Cl\] done clear
  C)
  \[C{{H}_{2}}C{{l}_{2}}\]                    done clear
  D)
  \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer25)
  Which chloride is least reactive with the hydrolysis point of view?
  A)
  \[C{{H}_{3}}Cl\]                      done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}Cl\] done clear
  C)
  \[{{\left( C{{H}_{3}} \right)}_{3}}CCl\]              done clear
  D)
  \[C{{H}_{2}}=CH-Cl\] done clear
  View Solution play_arrow

• question_answer26)
  The reaction is described as
  A)
  \[{{S}_{E}}2\]                          done clear
  B)
  \[{{S}_{N}}1\] done clear
  C)
  \[{{S}_{N}}2\]                          done clear
  D)
  \[{{S}_{N}}0\] done clear
  View Solution play_arrow

• question_answer27)
  Replacement of \[Cl\] of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4-dinitrochlorobenzene is readily replaced. This is because
  A)
  \[N{{O}_{2}}\] makes the ring electron rich at ortho and para positions. done clear
  B)
  \[N{{O}_{2}}\] withdraws \[{{e}^{-}}\] from meta-position. done clear
  C)
  \[N{{O}_{2}}\] donates \[{{e}^{-}}\] at meta-position. done clear
  D)
  \[N{{O}_{2}}\] withdraws \[{{e}^{-}}\] from ortho/para-positions. done clear
  View Solution play_arrow

• question_answer28)
  \[C{{H}_{3}}-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] obtained by chlorination of n-butane, will be
  A)
  meso-form        done clear
  B)
  racemic mixture done clear
  C)
  d-form               done clear
  D)
  l-form done clear
  View Solution play_arrow

• question_answer29)
  Which compound in each of the following pairs is most reactive to the conditions indicated?

  [A] and	[B]
  [C]  and	[D]

  A)
  A and C            done clear
  B)
  B and C done clear
  C)
  A and D                        done clear
  D)
  B and D done clear
  View Solution play_arrow

• question_answer30)
  2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is
  A)
  2-Ethoxypentane done clear
  B)
  Pentene-1 done clear
  C)
  cis-Pentene-2     done clear
  D)
  trans-Pentene-2 done clear
  View Solution play_arrow

• question_answer31)
  In the following reaction, compound [B] is
  A)
                   done clear
  B)
  done clear
  C)
               done clear
  D)
    done clear
  View Solution play_arrow

• question_answer32)
  Which of the following is not expected to be intermediate of the following reaction?
  A)
                         done clear
  B)
  done clear
  C)
                     done clear
  D)
  done clear
  View Solution play_arrow

• question_answer33)
  Among the given halides, which one will give same product in both \[{{S}_{N}}1\] and \[{{S}_{N}}2\] reactions?

  (I) \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]

  (II)           (III)

  (IV)\[C{{H}_{3}}-\underset{Et}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-Br\]

  A)
  (III) only            done clear
  B)
  (I) and (II) done clear
  C)
  (III) and (IV)       done clear
  D)
  (I), (III) and (IV) done clear
  View Solution play_arrow

• question_answer34)
  \[C{{H}_{3}}C{{H}_{2}}Cl\xrightarrow{NaCN}X\xrightarrow{Ni/{{H}_{2}}}\]\[Y\xrightarrow[anhydride]{Acetic}Z\] Z in the above reaction sequence is
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}NHCOC{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}N{{H}_{2}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CONHC{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CONHCOC{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer35)
  Which of the following is most reactive towards \[{{S}_{N}}2\] reaction?
  A)
                       done clear
  B)
  done clear
  C)
                       done clear
  D)
  done clear
  View Solution play_arrow

• question_answer36)
  Identify correct reactivity order for \[{{S}_{N}}1\] reaction

  (i)

  (ii)

  (iii)

  A)
  i>ii>iii                          done clear
  B)
  ii>iii>i done clear
  C)
  i>iii>ii                          done clear
  D)
  iii>ii>i done clear
  View Solution play_arrow

• question_answer37)
  Which compound undergoes nucleophilic substitution with \[NaCN\] at the fastest rate?
  A)
                   done clear
  B)
  done clear
  C)
      done clear
  D)
  done clear
  View Solution play_arrow

• question_answer38)
  Identify correct reactivity order for \[{{S}_{N}}1\] reaction

  (i)

  (ii)

  (iii)

  A)
  i>ii>iii                          done clear
  B)
  ii>iii>i done clear
  C)
  i>iii>ii                          done clear
  D)
  ii>i>iii done clear
  View Solution play_arrow

• question_answer39)
  Which one of the sequences below is the best synthesis of(E)-3-hexene?
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer40)
  Which of the following reacts at the fast rate with \[C{{H}_{3}}OK\] in \[C{{H}_{3}}OH\] ?
  A)
                done clear
  B)
  done clear
  C)
    done clear
  D)
  done clear
  View Solution play_arrow

• question_answer41)
  In the following sequence of reactions \[\underset{A}{\mathop{C{{H}_{3}}C{{H}_{2}}I}}\,\xrightarrow[ether]{Mg}B\xrightarrow{HCHO}C\xrightarrow{{{H}_{2}}O}D\] the compound D is
  A)
  propanal            done clear
  B)
  butanal done clear
  C)
  n-butyl alcohol   done clear
  D)
  n-propyl alcohol done clear
  View Solution play_arrow

• question_answer42)
  The correct product obtained in the reaction
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer43)
  2-phenyl-2-hexanol can be prepared by Grignard synthesis. The pair of compounds giving the desired product is
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer44)
  In the following reaction sequence: \[\underset{({{C}_{3}}\overset{{}}{\mathop{{{H}_{6}}}}\,C{{l}_{2}})}{\mathop{I}}\,\xrightarrow{KOH(aq)}II\xrightarrow[(ii){{H}_{2}}O/{{H}^{+}}]{(i)C{{H}_{3}}MgBr}III\] \[\xrightarrow{Anhy.ZnC{{l}_{2}}+Conc.HCl}given\,turbidity\,immediately\] The compound I is:
  A)
  \[\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] done clear
  B)
  \[\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,{{H}_{2}}-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,{{H}_{3}}\] done clear
  C)
  \[Cl-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}-\underset{Cl}{\mathop{\overset{Cl}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer45)
  Compound that on hydrogenation produces optically inactive compound is
  A)
              done clear
  B)
  done clear
  C)
             done clear
  D)
  done clear
  View Solution play_arrow

• question_answer46)
  Which of the following order is not correct?
  A)
  \[MeBr>M{{e}_{2}}CHBr>\] \[M{{e}_{3}}CBr>E{{t}_{3}}CBr\left( {{S}_{N}}2 \right)\] done clear
  B)
  \[PhC{{H}_{2}}Br>Ph\,CHBrMe>PhCBrM{{e}_{2}}>\]\[PhCBrMePh\left( {{S}_{N}}1 \right)\] done clear
  C)
  \[MeI>MeBr>MeCl>MeF({{S}_{N}}2)\] done clear
  D)
  All are correct done clear
  View Solution play_arrow

• question_answer47)
  The major product of the following reaction is: \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}-\underset{Br}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}-C{{H}_{3}}\xrightarrow[{{C}_{2}}{{H}_{5}}OH]{{{C}_{2}}{{H}_{5}}ONa}\]
  A)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}-\underset{O{{C}_{2}}{{H}_{5}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}-C{{H}_{3}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{5}}CH=\underset{C{{H}_{3}}}{\overset{{}}{\mathop{\underset{|}{\overset{{}}{\mathop{C}}}\,}}}\,-C{{H}_{2}}-C{{H}_{3}}\] done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,=CHC{{H}_{3}}\] done clear
  D)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}-\underset{C{{H}_{2}}C{{H}_{3}}}{\overset{{}}{\mathop{\underset{|}{\overset{{}}{\mathop{C}}}\,}}}\,=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer48)
  The compound most reactive towards \[{{S}_{N}}1\] reaction
  A)
  \[M{{e}_{3}}COC{{H}_{2}}Cl\]           done clear
  B)
  \[MeOC{{H}_{2}}Cl\] done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{H}_{2}}Cl\]       done clear
  D)
  done clear
  View Solution play_arrow

• question_answer49)
  Which chloro derivative of benzene among the following would undergo hydrolysis most readily with an aqueous sodium hydroxide to furnish the corresponding hydroxy derivative?
  A)
  done clear
  B)
  done clear
  C)
          done clear
  D)
  \[{{C}_{6}}{{H}_{5}}Cl\] done clear
  View Solution play_arrow

• question_answer50)
  In the following sequence of reactions, which is incorrect \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\xrightarrow[80{}^\circ C]{HBr}\text{ }A\xrightarrow{HBr}B\]                         \[\xrightarrow{Mg}C\]
  A)
  A is \[C{{H}_{3}}-CH=CH-C{{H}_{2}}Br\] done clear
  B)
  B is \[C{{H}_{3}}CHBr-C{{H}_{2}}-C{{H}_{2}}-Br\] done clear
  C)
  C is cyclopropyi methane done clear
  D)
  B on \[{{S}_{N}}2\] with aqueous \[NaOH\] gives \[C{{H}_{3}}CHOH.C{{H}_{2}}C{{H}_{2}}Br\] and not \[C{{H}_{3}}CHBr.C{{H}_{2}}C{{H}_{2}}OH\] done clear
  View Solution play_arrow

• question_answer51)
  The final product obtained in the reaction
  A)
                       done clear
  B)
  done clear
  C)
                       done clear
  D)
  done clear
  View Solution play_arrow

• question_answer52)
  The following reaction proceeds through the intermediate formation of \[RCOOAg+B{{r}_{2}}\xrightarrow{{}}RBr+C{{O}_{2}}+AgBr\]
  A)
  \[RCO{{O}^{\bullet }}\]  done clear
  B)
  \[{{R}^{\bullet }}\] done clear
  C)
  \[B{{r}^{\bullet }}\]                              done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer53)
  The compound \[{{C}_{7}}{{H}_{8}}\xrightarrow{3C{{l}_{2}}/\Delta }A\xrightarrow{B{{r}_{2}}/Fe}B\xrightarrow{Zn/HCl}C\]. The compound C is
  A)
  o-Bromotoluene done clear
  B)
  m-Bromotoluene done clear
  C)
  p-Bromotoluene done clear
  D)
  3-Bromo-2,4,6-trichlorotoluene done clear
  View Solution play_arrow

• question_answer54)
  The product of 1-bromo-3-chloro cyclobutane with Na in presence ofdioxane
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer55)
  Which of the following has the weakest carbon - chlorine bond?
  A)
               done clear
  B)
  done clear
  C)
                     done clear
  D)
  done clear
  View Solution play_arrow

• question_answer56)
  Which of the following is correct?
  A)
  A on reaction with aq. KOH gives \[HOC{{H}_{2}}C{{H}_{2}}COOK\] done clear
  B)
  B can be resolved into d- and l-forms done clear
  C)
  Both [a] and [b] done clear
  D)
  Neither [a] nor [b] done clear
  View Solution play_arrow

• question_answer57)
  Although hexafluoroethane \[({{C}_{2}}{{F}_{6}},b.p.-79{}^\circ C)\] and ethane \[({{C}_{2}}{{H}_{6}},b.p.-89{}^\circ C)\] differ very much in their molecular weights, their boiling points differ only by\[10{}^\circ C\]. This is due to  
  A)
  lowpolarizability of F               done clear
  B)
  nearly similar size of F and H done clear
  C)
  both [a] and [b]          done clear
  D)
  Neither of the two done clear
  View Solution play_arrow

• question_answer58)
  Which of the following is a key intermediate in the reaction shown below?
  A)
                    done clear
  B)
  done clear
  C)
                    done clear
  D)
    done clear
  View Solution play_arrow

• question_answer59)
  Which of the following structure is more stable?
  A)
  done clear
  B)
     done clear
  C)
                       done clear
  D)
  done clear
  View Solution play_arrow

• question_answer60)
  Which of the following is (are) true concerning the intermediate in the addition-elimination mechanism of the following reaction? A = The intermediate is aromatic, B = The intermediate is a resonance stabilised anion, C = Electron withdrawing groups on the benzene ring stabilises the intermediate
  A)
  only A               done clear
  B)
  only B done clear
  C)
  A and C            done clear
  D)
  B and C done clear
  View Solution play_arrow

• question_answer61)
  Identify Z in \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\xrightarrow{aq.\,NaOH}X\] \[\xrightarrow{A{{l}_{2}}{{O}_{3}}}Y\xrightarrow{C{{l}_{2}}/{{H}_{2}}O}Z\]
  A)
  Mixture of \[C{{H}_{3}}CHClC{{H}_{2}}Cl\] and \[C{{H}_{3}}CHOHC{{H}_{2}}Cl\] done clear
  B)
  \[C{{H}_{3}}CHOHC{{H}_{2}}Cl\] done clear
  C)
  \[C{{H}_{3}}CHClC{{H}_{2}}OH\] done clear
  D)
  \[C{{H}_{3}}CHClC{{H}_{2}}Cl\] done clear
  View Solution play_arrow

• question_answer62)
    \[\xrightarrow{peroxide}A,\] then A is-
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer63)
  Silver benzoate reacts with bromine to form
  A)
                        done clear
  B)
  done clear
  C)
     done clear
  D)
  \[{{C}_{6}}{{H}_{5}}Br\] done clear
  View Solution play_arrow

• question_answer64)
  \[PhCOCHB{{r}_{2}}\xrightarrow{O{{H}^{-}}}A\xrightarrow{O{{H}^{-}}}B\xrightarrow{{{H}^{+}}}C\] The compound C is -
  A)
  \[PhCH\left( OH \right)CHO\] done clear
  B)
  \[PhCH\left( OH \right)COOH\] done clear
  C)
  \[PhCO\underset{H}{\mathop{\underset{|}{\mathop{C}}\,}}\,B{{r}_{2}}\] done clear
  D)
  \[Ph-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-OH\] done clear
  View Solution play_arrow

• question_answer65)
  
  A)
                   done clear
  B)
  done clear
  C)
  Both [a] and [b] done clear
  D)
  No reaction done clear
  View Solution play_arrow

• question_answer66)
  X in the following reaction is -
  A)
  (+) 2, 3-Dibromobutane done clear
  B)
  (-) 2, 3-Dibromobutane done clear
  C)
  (\[\pm \])- 2, 3-Dibromobutane done clear
  D)
  meso-2, 3-Dibromobutane done clear
  View Solution play_arrow

• question_answer67)
  The missing reagents \[{{R}_{1}}\] and \[{{R}_{2}}\] in the following series of reactions are   \[C{{H}_{3}}C{{H}_{2}}Br\xrightarrow{{{R}_{1}}}[\,\,\,\,]\xrightarrow{{{R}_{2}}}C{{H}_{3}}\overset{-}{\mathop{C}}\,H{{P}^{+}}P{{h}_{3}}\]
  A)
  PhLi and \[P{{h}_{3}}P\] respectively done clear
  B)
  \[P{{h}_{3}}P\] and PhLi respectively done clear
  C)
  \[P{{h}_{3}}P\] and \[{{C}_{2}}{{H}_{5}}ONa\] respectively done clear
  D)
  Either [b] or [c] done clear
  View Solution play_arrow

• question_answer68)
  The reaction of toluene with chlorine in presence of ferric chloride gives predominantly:
  A)
  benzoyl chloride done clear
  B)
  m-chlorotoluene done clear
  C)
  benzyl chloride done clear
  D)
  o- and p-chlorotoluene done clear
  View Solution play_arrow

• question_answer69)
  Arrange the following in order of decreasing rate of solvolysis with aqueous ethanol (fastest \[\to \] slowest)

  (1)           (2)

  (3)

  A)
  2>1>3                         done clear
  B)
  1>2>3 done clear
  C)
  2>3>1                         done clear
  D)
  1>3>2 done clear
  View Solution play_arrow

• question_answer70)
  Which of the following alkyl halide undergo rearrangement in \[{{S}_{N}}1\] reaction?
  A)
            done clear
  B)
  done clear
  C)
                     done clear
  D)
  All of these done clear
  View Solution play_arrow