NEET Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank

done Self Evaluation Test - Hydrocarbons Total Questions - 70

• question_answer1)
  Which of the following would not give 2-phenylbutane as the major product in a Friedel- Crafts alkylation reaction on benzene ring?
  A)
  1-butene+HF done clear
  B)
  2-butanol \[+{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  Butanoyl chloride \[+AlC{{l}_{3}}\] then \[Zn,HCl\] done clear
  D)
  Butyl chloride \[+AlC{{l}_{3}}\] done clear
  View Solution play_arrow

• question_answer2)
  Which of the following compounds are antiaromatic
  A)
  (l) and (V)        done clear
  B)
  (II) and (V) done clear
  C)
  (I) and (IV)         done clear
  D)
  (V) and (VI) done clear
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• question_answer3)
  Which one of the following reactions is expected to readily give a hydrocarbon product in good yields? 
  A)
  \[RCOOK~\xrightarrow[oxidation]{Electrolytic}\] done clear
  B)
  \[RCO{{O}^{-}}A{{g}^{+}}\xrightarrow{B{{r}_{2}}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{3}}\xrightarrow[hv]{C{{l}_{2}}}\] done clear
  D)
  \[{{(C{{H}_{3}})}_{3}}CCl\ \xrightarrow{{{C}_{2}}{{H}_{5}}OH}\] done clear
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• question_answer4)
  [A] Double bond equivalent (degree of unsaturation) of [A] is:
  A)
  1                                  done clear
  B)
  2     done clear
  C)
  3                                  done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer5)
  An alkene having molecular formula \[{{C}_{7}}{{H}_{14}}\] was subjected to ozonolysis in the presence of zinc dust. An equimolar amount of the following two compounds was obtained The IUPAC name of the alkene is
  A)
  3, 4-dimethyl-3-pentene done clear
  B)
  3, 4-dimethyl-2-pentene done clear
  C)
  2, 3-dimethyl-3-pentene done clear
  D)
  2, 3-dimethyl-2-pentene done clear
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• question_answer6)
  Which of the following will yield a mixture of 2-chlorobutene and 3-chlorobutene on treatment with\[HCl\]? 
  A)
  \[C{{H}_{2}}=C=CH-C{{H}_{3}}\] done clear
  B)
  \[{{H}_{2}}C=\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}\] done clear
  C)
  \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] done clear
  D)
  \[HC\equiv C-CH=C{{H}_{2}}\] done clear
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• question_answer7)
  Which of the following statements is incorrect regarding dehydrohalogenation of alkenes?
  A)
  During the reaction hydrogen atom is eliminated from the P - carbon atom. done clear
  B)
  Rate of reaction for same alkyi group; Iodine > Bromine > Chlorine done clear
  C)
  Rate of reaction; \[{{(C{{H}_{3}})}_{3}}C->{{(C{{H}_{3}})}_{2}}CH->C{{H}_{3}}C{{H}_{2}}-\] done clear
  D)
  Only nature of halogen atom determine rate of the reaction. done clear
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• question_answer8)
  Which of the following will form alkynide?
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer9)
  \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,C\equiv CH~\xrightarrow{excess\,\,HBr}\] The product of the above reaction is:
  A)
  \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-\overset{Br}{\mathop{\overset{|}{\mathop{C}}\,}}\,={{\overset{Br}{\mathop{\overset{|}{\mathop{CH}}\,}}\,}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-\overset{Br}{\mathop{\overset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\] done clear
  C)
  \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-\underset{Br}{\mathop{\underset{|}{\mathop{\overset{Br}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,=C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{Br}{\mathop{\underset{|}{\mathop{\overset{Br}{\mathop{\overset{|}{\mathop{CH}}\,}}\,}}\,}}\,\] done clear
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• question_answer10)
  What is the end product of the following sequences of operations? \[Ca{{C}_{2}}\xrightarrow{{{H}_{2}}O}A\xrightarrow[H{{g}^{2+}}]{dil.\,{{H}_{2}}S{{O}_{4}}}B\xrightarrow[{{H}_{2}}]{Ni}C\]
  A)
  Methyl alcohol   done clear
  B)
  Acetaldehyde done clear
  C)
  \[{{C}_{2}}{{H}_{5}}OH\]                  done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer11)
  \[B{{r}^{\bullet }}\] will abstract which of the hydrogen most readily?
  A)
  a                                  done clear
  B)
  b     done clear
  C)
  c                                   done clear
  D)
  d done clear
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• question_answer12)
  Consider the following reaction \[{{H}_{3}}C-\underset{D}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}+\overset{\bullet }{\mathop{B}}\,r\xrightarrow{{}}'X'+HBr\] Identify the structure of the major product 'X'
  A)
  \[{{H}_{3}}C-\underset{D}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\overset{\bullet }{\mathop{C}}\,{{H}_{2}}\] done clear
  B)
  \[{{H}_{3}}C-\underset{D}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\overset{\bullet }{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,-\overset{{}}{\mathop{C}}\,{{H}_{2}}\] done clear
  C)
  \[{{H}_{3}}C-\overset{\bullet }{\mathop{\underset{D}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,-\overset{{}}{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,}}\,-\overset{{}}{\mathop{C}}\,{{H}_{3}}\] done clear
  D)
  \[{{H}_{3}}C-\overset{\bullet }{\mathop{CH}}\,-\overset{{}}{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,}}\,-\overset{{}}{\mathop{C}}\,{{H}_{3}}\] done clear
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• question_answer13)
  Predict the product [A] of the following reaction
  A)
                      done clear
  B)
  done clear
  C)
                     done clear
  D)
  done clear
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• question_answer14)
  Consider the following sequence of reactions \[C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[700k]{C{{l}_{2}}}A\xrightarrow[420k,\,12atm]{N{{a}_{2}}C{{O}_{3}}}\] \[B\xrightarrow[(ii)NaOH]{(i)\,HOCl}C\]
  A)
              done clear
  B)
    done clear
  C)
  \[HOC{{H}_{2}}-CH=C{{H}_{2}}\]     done clear
  D)
  \[C{{H}_{3}}\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,OCl\] done clear
  View Solution play_arrow

• question_answer15)
  Choose the correct alkyne and reagents for the preparation of
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer16)
  The major product obtained in the following reaction
  A)
              done clear
  B)
  done clear
  C)
             done clear
  D)
  done clear
  View Solution play_arrow

• question_answer17)
  A compound (X) \[({{C}_{5}}{{H}_{8}})\] reacts with ammonical \[AgN{{O}_{3}}\] to give a white precipitate, and on oxidation with hot alkaline \[KMn{{O}_{4}}\] gives the acid, \[{{(C{{H}_{3}})}_{2}}CHCOOH\], therefore X is -
  A)
  \[C{{H}_{2}}=CH-CH=CH-C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}-CH=CH-C{{H}_{2}}-C{{H}_{3}}\] done clear
  C)
  \[{{(C{{H}_{3}})}_{2}}CH-C=CH\] done clear
  D)
  \[{{(C{{H}_{3}})}_{2}}C=C\equiv C{{H}_{2}}\] done clear
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• question_answer18)
  The major product of the following reaction
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer19)
    Which of the following products cannot be obtained in ozonolysis of o-xylene?
  A)
                 done clear
  B)
  done clear
  C)
         done clear
  D)
  done clear
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• question_answer20)
  Compare rate of dehydration of (I), (II) and (III) by cone.\[{{H}_{2}}S{{O}_{4}}\].   

  I.

  II.

  III.

  A)
  (I) > (III) > (II)       done clear
  B)
  (I) > (II) > (Ill) done clear
  C)
  (II) > (I) > (III)        done clear
  D)
  (II) > (III) > (I) done clear
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• question_answer21)
  In which step of the following reaction, \[s{{p}^{3}}\] carbon changes to \[s{{p}^{2}}\] carbon?
  A)
  Step 1          done clear
  B)
  Step 2 done clear
  C)
  Both                             done clear
  D)
  None done clear
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• question_answer22)
  Toluene reacts with excess of \[C{{l}_{2}}\] in presence of sun light to give a product which on hydrolysis by reaction with \[NaOH\] gives
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  None of these done clear
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• question_answer23)
  The major product formed in the reaction is:
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer24)
  The major product obtained in the photo catalysed bromination of 2-methylbutane is:
  A)
  1-bromo-2-methylbutane done clear
  B)
  1-bromo-3-methylbutane done clear
  C)
  2-bromo-3-methylbutane done clear
  D)
  2-bromo-2-methylbutane done clear
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• question_answer25)
  In the hydroboration - oxidation reaction of propene with diborane, \[{{H}_{2}}{{O}_{2}}\] and \[NaOH,\] the organic compound formed is:
  A)
  \[C{{H}_{3}}C{{H}_{2}}OH\]              done clear
  B)
  \[C{{H}_{3}}CHOHC{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]       done clear
  D)
  \[{{(C{{H}_{3}})}_{3}}COH\] done clear
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• question_answer26)
  In the given reaction,
  A)
  done clear
  B)
  done clear
  C)
             done clear
  D)
    done clear
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• question_answer27)
  The product of the reaction between ethyl benzene and N-bromosuccinamide is
  A)
  done clear
  B)
    done clear
  C)
    done clear
  D)
  done clear
  View Solution play_arrow

• question_answer28)
  In preparation of alkene from alcohol using \[A{{l}_{2}}{{O}_{3}}\] which is effective factor?
  A)
  Porosity of \[A{{l}_{2}}{{O}_{3}}\] done clear
  B)
  Temperature done clear
  C)
  Concentration done clear
  D)
  Surface area of \[A{{l}_{2}}{{O}_{3}}\] done clear
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• question_answer29)
  Which one of the following compounds would have the highest heat of hydrogenation?
  A)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  C)
  \[C{{H}_{3}}CH=CHC{{H}_{3}}\] done clear
  D)
  \[{{\left( C{{H}_{3}} \right)}_{2}}C=C{{\left( C{{H}_{3}} \right)}_{2}}\] done clear
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• question_answer30)
  Which of the following types of reaction occur when a reactant has got a double bond?

  (i) Addition

  (ii) Photolysis

  (iii) Nucleophilic substitution

  (iv) Polymerization

  A)
  (i) and (iv)          done clear
  B)
  (i) and (ii) done clear
  C)
  (i), (ii) and (iv)                done clear
  D)
  (i),(ii),(iii) and (iv) done clear
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• question_answer31)
  \[HOCl\] reacts on 3-methyl-2-pentene, the main product will be:
  A)
  \[C{{H}_{3}}-CH=\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,-CH-(OH)-C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}-\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] done clear
  D)
  None of these done clear
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• question_answer32)
  The major product of the following reaction sequence is:
  A)
                     done clear
  B)
  done clear
  C)
                       done clear
  D)
  done clear
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• question_answer33)
  All the hydrocarbons shown are very weak acids. One, however, is far more acidic than the others. Which one is the strongest acid?
  A)
                          done clear
  B)
  done clear
  C)
      done clear
  D)
  done clear
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• question_answer34)
  Which one amongst the following carbocations is most stable?
  A)
  \[{{C}_{6}}{{H}_{5}}-\overset{+}{\mathop{C}}\,H-{{C}_{6}}{{H}_{5}}\] done clear
  B)
  done clear
  C)
  \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{+}{\mathop{C}}}\,}}\,-C{{H}_{3}}\] done clear
  D)
  done clear
  View Solution play_arrow

• question_answer35)
  Toluene on treatment with \[Cr{{O}_{3}}\] and \[{{(C{{H}_{3}}CO)}_{2}}O\] followed by hydrolysis with dil. \[HCl\] gives
  A)
  benzaldehyde done clear
  B)
  benzoicacid done clear
  C)
  phenol done clear
  D)
  phenylacetaldehyde done clear
  View Solution play_arrow

• question_answer36)
  What is the correct product of reaction?
  A)
     done clear
  B)
  done clear
  C)
                done clear
  D)
  done clear
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• question_answer37)
  Of the three isomeric \[{{C}_{3}}{{H}_{4}}\] hydrocarbons shown below how many can exist with all carbon and hydrogen nuclei located in a single plane
  A)
  0                      done clear
  B)
  1 done clear
  C)
  2                                  done clear
  D)
  3 done clear
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• question_answer38)
  \[\xrightarrow[(ii)\,C{{H}_{3}}Br]{(i)\,NaN{{H}_{2}};N{{H}_{3}}}(A)\xrightarrow[Lindlar\,catalyst]{{{H}_{2}}}(B);\] Product (B) is:
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer39)
  Among the following free radical bromination reactions, select those in which \[2{}^\circ \] halide is the major product                              

  (P)	(Q)
  (R)	(S)
  (T)	(U)

  A)
  P, Q, R, S          done clear
  B)
  P, R, U done clear
  C)
  P, R, S, T          done clear
  D)
  P, Q, R, S, T done clear
  View Solution play_arrow

• question_answer40)
  The gas liberated by the electrolysis of dipotassium succinate solution is:
  A)
  Ethane              done clear
  B)
  Ethyne done clear
  C)
  Ethene           done clear
  D)
  Propene done clear
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• question_answer41)
  In the presence of peroxide, \[HCl\] and HI do not give anti-Markownikoff's addition of alkenes because:
  A)
  One of the steps is endothermic in \[HCl\] and HI done clear
  B)
  Both \[HCl\] and HI are strong acids done clear
  C)
  \[HCl\] is oxidizing and the HI is reducing done clear
  D)
  All the steps are exothermic is \[HCl\] and HI done clear
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• question_answer42)
  Consider the following sequence of reactions \[C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[700k]{C{{l}_{2}}}A\xrightarrow[420k,\,12\,atm]{N{{a}_{2}}C{{O}_{3}}}B\] Compound 'B' is
  A)
             done clear
  B)
    \[C{{H}_{3}}CH\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,OONa\] done clear
  C)
  \[HOC{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  D)
  \[C{{H}_{3}}\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,HOCl\] done clear
  View Solution play_arrow

• question_answer43)
  How many monochlorolmtanes will be obtained on chlorination of n-butane?
  A)
  5                                  done clear
  B)
  2     done clear
  C)
  3                                  done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer44)
  The cycloalkane having the lowest heat of combustion per \[C{{H}_{2}}\] group
  A)
                          done clear
  B)
  done clear
  C)
                done clear
  D)
  done clear
  View Solution play_arrow

• question_answer45)
  Which one of the following conformations of cyclohexane is chiral?
  A)
  Boat                             done clear
  B)
  Twist boat done clear
  C)
  Rigid                             done clear
  D)
  Chair done clear
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• question_answer46)
  Which one of the following compounds gives acetone \[{{(C{{H}_{3}})}_{2}}C=0\] as one of the product of its ozonolysis?
  A)
                        done clear
  B)
  done clear
  C)
                        done clear
  D)
  done clear
  View Solution play_arrow

• question_answer47)
  
  A)
  \[{{H}_{2}}O/{{H}^{+}}\] done clear
  B)
  \[B{{H}_{3}},THF/{{H}_{2}}{{O}_{2}}-O{{H}^{-}}\] done clear
  C)
  \[Hg{{(OCOC{{H}_{3}})}_{2}},{{H}_{2}}O/NaB{{H}_{4}}.NaOH\] done clear
  D)
  All are possible done clear
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• question_answer48)
  In reaction sequence \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow[acid]{Hypochlorous}M\xrightarrow{R}\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}OH}{\mathop{|}}}\,\] molecule 'M' and reagent 'R' respectively are
  A)
  \[C{{H}_{3}}C{{H}_{2}}Cl\] and \[NaOH\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}OH\] and \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  \[C{{H}_{2}}(Cl)C{{H}_{2}}OH\] and aqueous \[NaHC{{O}_{3}}\] done clear
  D)
   and Heat done clear
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• question_answer49)
  What is the major product expected from the following reaction? Where D is an isotope of hydrogen
  A)
                   done clear
  B)
  done clear
  C)
       done clear
  D)
  done clear
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• question_answer50)
  The reagent needed for converting 
  A)
  Cat. Hydrogenation done clear
  B)
  \[{{H}_{2}}\]/Lindlar Cat. done clear
  C)
  \[Li/N{{H}_{3}}\] done clear
  D)
  \[LiAl{{H}_{4}}\]   done clear
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• question_answer51)
  Addition of HI to double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product, because addition proceeds through
  A)
  a more stable carbonium ion done clear
  B)
  a more stabi e carban ion done clear
  C)
  a more stable free radical done clear
  D)
  homolysis done clear
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• question_answer52)
  The principal organic product formed in the reaction, \[C{{H}_{2}}=CH{{(C{{H}_{2}})}_{8}}COOH+HBr\,\xrightarrow{peroxide}\] is
  A)
  \[C{{H}_{3}}CHBr{{(C{{H}_{2}})}_{8}}COOH\] done clear
  B)
  \[C{{H}_{2}}=CH{{(C{{H}_{2}})}_{8}}COBr\] done clear
  C)
  \[C{{H}_{2}}BrC{{H}_{2}}{{(C{{H}_{2}})}_{8}}COOH\] done clear
  D)
  \[C{{H}_{2}}=CH{{(C{{H}_{2}})}_{7}}CHBrCOOH\] done clear
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• question_answer53)
  Acid catalyzed hydration of alkenes except ethane leads to the formation of
  A)
  mixture of secondary and tertiary alcohols done clear
  B)
  mixture of primary and secondary alcohols done clear
  C)
  secondary or tertiary alcohol done clear
  D)
  primary alcohol done clear
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• question_answer54)
  Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne
  A)
  bromine, \[CC{{l}_{4}}\] done clear
  B)
  \[{{H}_{2}}\], Lindlar catalyst done clear
  C)
  dilute \[{{H}_{2}}S{{O}_{4}}\], \[HgS{{O}_{4}}\] done clear
  D)
  ammonical \[C{{u}_{2}}C{{l}_{2}}\] solution done clear
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• question_answer55)
  An unknown compound A has a molecular formula \[{{C}_{2}}{{H}_{6}}\], when A is treated with an excess of\[B{{r}_{2}}\], a new substance B with formula \[{{C}_{4}}{{H}_{6}}B{{r}_{2}}\]is formed. A forms a white precipitate with ammonical silver nitrate solution. A may be
  A)
  Butyne-1           done clear
  B)
  Butyne-2 done clear
  C)
  Butene-1            done clear
  D)
  Butene-2 done clear
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• question_answer56)
  The major product formed in the reaction is:
  A)
    done clear
  B)
  done clear
  C)
                          done clear
  D)
  done clear
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• question_answer57)
  On mercuration-demercuration produces the major product:
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer58)
  Which one of the following class of compounds is obtained by polymerization of acetylene?
  A)
  Poly-yne        done clear
  B)
  Poly-ene done clear
  C)
  Poly-ester        done clear
  D)
  Poly-amine done clear
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• question_answer59)
  The hydration of propyne results in formation of
  A)
  Acetone             done clear
  B)
  Propanol-1 done clear
  C)
  Propene             done clear
  D)
  Propanal done clear
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• question_answer60)
  
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer61)
    is:
  A)
                    done clear
  B)
  done clear
  C)
                      done clear
  D)
  done clear
  View Solution play_arrow

• question_answer62)
  Product of the reaction is:
  A)
                done clear
  B)
  done clear
  C)
              done clear
  D)
  done clear
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• question_answer63)
  Which of the following change is correct
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer64)
  Which of the following change is correct
  A)
  done clear
  B)
  done clear
  C)
  Both [a] and [b] one correct done clear
  D)
  Neither [a] nor [b] done clear
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• question_answer65)
  Choose the correct product of the following reaction
  A)
    done clear
  B)
  done clear
  C)
     done clear
  D)
    done clear
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• question_answer66)
  The two compounds A and B obtained from 1-butyne can be distinguished by \[B\xleftarrow[(ii)\,{{H}_{2}}{{O}_{2}}]{(i)\,B{{H}_{3}}}C{{H}_{3}}C{{H}_{2}}C\equiv CH\xrightarrow{{{H}^{+}}/H{{g}^{2+}}}A\]
  A)
  \[NaHS{{O}_{3}}\] done clear
  B)
  litmus solution done clear
  C)
  iodoform test     done clear
  D)
  2, 4-DNP done clear
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• question_answer67)
  Identify the position where electrophilic aromatic substitution (EAS) is most favourable.
  A)
  A                                  done clear
  B)
  B done clear
  C)
  C                                  done clear
  D)
  A and C done clear
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• question_answer68)
  Arrange the following in decreasing order of reactivity towards EAS (electrophilic aromatic substitution)
  A)
  a > b > c                          done clear
  B)
  c > b > a done clear
  C)
  a > c > b                          done clear
  D)
  c > a > b done clear
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• question_answer69)
  Which of the following is an aromatic species?
  A)
    done clear
  B)
  done clear
  C)
              done clear
  D)
  All of the three done clear
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• question_answer70)
  Product [A] of above reaction is:
  A)
                done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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