Solved papers for NEET Chemistry NEET PYQ-Haloalkanes and Haloarenes

done NEET PYQ-Haloalkanes and Haloarenes Total Questions - 37

• question_answer1) 2-bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is: [AIPMT 1998]
  A)
  2-ethoxypentane
  done clear
  B)
  pentene-1
  done clear
  C)
  trans-pentene-2
  done clear
  D)
  cis-pentene-2
  done clear
  View Answer play_arrow

• question_answer2) Iodoform test is not given by:       [AIPMT 1998]
  A)
  2-pentanone
  done clear
  B)
  ethanol
  done clear
  C)
  ethanol
  done clear
  D)
  3-pentanone
  done clear
  View Answer play_arrow

• question_answer3) Ethyl chloride is converted into diethyl ether by: [AIPMT 1999]
  A)
  Wurtz synthesis  
  done clear
  B)
  Grignard reaction
  done clear
  C)
  Perkin's reaction 
  done clear
  D)
  Williamson's synthesis
  done clear
  View Answer play_arrow

• question_answer4) Gammexane is:                         [AIPMT 1999]
  A)
  chlorobenzene    
  done clear
  B)
  benzyl chloride
  done clear
  C)
  bromobenzene   
  done clear
  D)
  benzene hexachloride
  done clear
  View Answer play_arrow

• question_answer5) An organic compound \[A({{C}_{4}}{{H}_{9}}Cl)\] on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is:                      [AIPMT 2001]
  A)
  t-butyl chloride
  done clear
  B)
  sec- butyl chloride
  done clear
  C)
  iso butyl chloride
  done clear
  D)
  n-butyl chloride
  done clear
  View Answer play_arrow

• question_answer6) 

  Product ‘P’ in the above reaction is:                                   [AIPMT 2002]

  A)
  
  done clear
  B)
  
  done clear
  C)
   
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer7) Reactivity order of halides for dehydrohalogenation is:                   [AIPMT 2002]
  A)
  \[R-F>R-Cl>R-Br>R-I\]
  done clear
  B)
       \[R-I>R-Br>R-Cl>R-F\]
  done clear
  C)
  \[R-I>R-Cl>R-Br>R-F\]  
  done clear
  D)
  \[R-F>R-I>R-Br>R-Cl\]
  done clear
  View Answer play_arrow

• question_answer8) 

  in above reaction product ‘P’ is:  [AIPMT 2002]

  A)
         
  done clear
  B)
        
  done clear
  C)
  
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}-\overset{\begin{smallmatrix}  O \\  |\,\,| \end{smallmatrix}}{\mathop{C}}\,-{{C}_{6}}{{H}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer9) When \[C{{H}_{3}}C{{H}_{2}}CHC{{l}_{2}}\] is treated with \[NaN{{H}_{2}}\] the product formed is:             [AIPMT 2002]
  A)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\]         
  done clear
  B)
  \[C{{H}_{3}}-C\equiv CH\]
  done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}CH\backslash /N{{H}_{2}}N{{H}_{2}}\]
  done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}CH\backslash /ClN{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer10) Which one of the following is a free radical substitution reaction?                  [AIPMT 2003]
  A)
  
  done clear
  B)
  \[C{{H}_{3}}CHO+HCN\xrightarrow[{}]{{}}C{{H}_{3}}CH(OH)CN\]
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer11) When m-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are):
  A)
            
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer12) Chloropicrin is obtained by &e reaction of:                             [AIPMT (S) 2004]
  A)
  steam on carbon tetrachloride
  done clear
  B)
  nitric acid on chlorobenzene
  done clear
  C)
  chlorine on picric acid
  done clear
  D)
  nitric acid on chloroform
  done clear
  View Answer play_arrow

• question_answer13) Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine? [AIPMT (S) 2004]
  A)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}\]          
  done clear
  B)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}\]
  done clear
  C)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{OH}\]    
  done clear
  D)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{OH}\]
  done clear
  View Answer play_arrow

• question_answer14) Which of the following is least reactive in anucleophilic substitution reaction?              [AIPMT (S) 2004]
  A)
  \[{{(C{{H}_{3}})}_{3}}C-Cl\]
  done clear
  B)
  \[\text{C}{{\text{H}}_{\text{2}}}=\,\,\text{CHC1}\]
  done clear
  C)
  \[\text{C}{{\text{H}}_{3}}\,\text{C}{{\text{H}}_{2}}\text{C1}\]
  done clear
  D)
  \[\text{C}{{\text{H}}_{\text{2}}}=\text{CHC}{{\text{H}}_{\text{2}}}\text{C1}\]
  done clear
  View Answer play_arrow

• question_answer15) Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism? [AIPMT (S) 2005]
  A)
  Benzyl chloride
  done clear
  B)
  Ethyl chloride
  done clear
  C)
  Chlorobenzene
  done clear
  D)
  Isopropyl chloride
  done clear
  View Answer play_arrow

• question_answer16) Ethylene oxide when treated with Grignard reagent yields:                    [AIPMT (S) 2006]
  A)
  secondary alcohol
  done clear
  B)
  tertiary alcohol
  done clear
  C)
  cyclopropyl alcohol
  done clear
  D)
  primary alcohol
  done clear
  View Answer play_arrow

• question_answer17) In a \[{{S}_{N}}2\] substitution reaction of the type \[R-Br+C{{l}^{-}}\xrightarrow[{}]{DNF}R-Cl+B{{r}^{-}},\]which one of the following has the highest relative rate?                                   [AIPMT (S) 2008]
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}Br\]      
  done clear
  B)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}Br\]
  done clear
  C)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}Br\]      
  done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}Br\]
  done clear
  View Answer play_arrow

• question_answer18) Which of the following reactions is an example of nucleophilic substitution reaction? [AIPMT (S) 2009]
  A)
  \[240\,\Omega \]
  done clear
  B)
  \[15\,\Omega \]
  done clear
  C)
  \[{{T}_{1}}\]
  done clear
  D)
  \[{{T}_{2}}({{T}_{1}}>{{T}_{2}}).\]
  done clear
  View Answer play_arrow

• question_answer19) Trichloroacetaldehyde, \[\overrightarrow{F}=6\hat{i}-8\hat{j}+10\hat{k},\]reacts with chlorobenzene in presence of sulphuric acid and produces [AIPMT (S) 2009]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer20) 

  For the reaction \[RX+Mg\xrightarrow[{}]{{}}RMgX\]products it is observed that

  (1) On doubling the initial concentration of A only the rate of reaction is also doubled and.

  (2) On doubling the initial concentrations of both A and B there is a change by a factor of 8 in the rate of the reaction.

  The rate of this reaction is given by                                                    [AIPMT (S) 2009]

  A)
  rate\[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  B)
  rate\[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  C)
  rate\[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  D)
  rate\[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  View Answer play_arrow

• question_answer21) Which one is most reactive towards \[{{S}_{N}}1\]reaction? [AIPMT (S) 2010]
  A)
  \[{{C}_{6}}{{H}_{5}}CH({{C}_{6}}{{H}_{5}})Br\]
  done clear
  B)
  \[{{C}_{6}}{{H}_{5}}CH(C{{H}_{3}})Br\]
  done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C(C{{H}_{3}})({{C}_{6}}{{H}_{5}})Br\]
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\]
  done clear
  View Answer play_arrow

• question_answer22) In       the       following       reaction\[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{\text{2}}}\text{Br}\frac{\text{1}\text{.Mg,}\,\text{Ether}}{\text{2}\text{.}{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}}\text{X,}\]the product 'X is       [AIPMT (M) 2010]
  A)
  \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{\text{2}}}\text{OC}{{\text{H}}_{\text{2}}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\]
  done clear
  B)
  \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{\text{2}}}\text{OH}\]
  done clear
  C)
  \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{3}}\]
  done clear
  D)
  \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{2}}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\]
  done clear
  View Answer play_arrow

• question_answer23) Which of the following compounds undergoes nucleophilic substitution reaction most easily? [AIPMT (M) 2011]
  A)
  
  done clear
  B)
   
  done clear
  C)
  
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer24) 

  Consider the reactions             [AIPMT (M) 2011]

  (i)\[{{(C{{H}_{3}})}_{2}}CH-C{{H}_{2}}Br\xrightarrow[{}]{{{C}_{2}}{{H}_{5}}OH}{{(C{{H}_{3}})}_{2}}CH\]\[-C{{H}_{2}}O{{C}_{2}}{{H}_{5}}+HBr\]

  (ii)\[{{(C{{H}_{3}})}_{2}}CH-C{{H}_{2}}Br\xrightarrow[{}]{{{C}_{2}}{{H}_{5}}{{O}^{-}}}{{(C{{H}_{3}})}_{2}}CH\]\[-C{{H}_{2}}O{{C}_{2}}{{H}_{5}}+B{{r}^{-}}\]

  The mechanisms of reactions CO and (ii) are respectively

  A)
  \[{{\text{S}}_{\text{N}}}\text{1}\,\text{and}\,{{\text{S}}_{\text{N}}}2\]
  done clear
  B)
  \[{{\text{S}}_{\text{N}}}\text{1}\,\text{and}\,{{\text{S}}_{\text{N}}}1\]
  done clear
  C)
  \[{{\text{S}}_{\text{N}}}2\,\text{and}\,{{\text{S}}_{\text{N}}}2\]
  done clear
  D)
  \[{{\text{S}}_{\text{N}}}2\,\text{and}\,{{\text{S}}_{\text{N}}}1\]
  done clear
  View Answer play_arrow

• question_answer25) 

  In the replacement reaction [AIPMT (M) 2012]

  The reaction will be most favorable if M happens to be

  A)
  Na
  done clear
  B)
  K    
  done clear
  C)
  Rb
  done clear
  D)
  Li
  done clear
  View Answer play_arrow

• question_answer26) 

  Which of the following compounds will undergo racemisation when solution of KQH hydrolysis? [AIPMT 2014]

  (i)

  (ii) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\]

  (iii) \[{{H}_{3}}C-\overset{\overset{CH}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}Cl\]

  (iv)

  A)
  (i) and (ii)
  done clear
  B)
  (ii) and (iv)
  done clear
  C)
  (iii) and (iv)
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer27) 

  The reaction,                     [NEET 2015 ]

  \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C}}}\,-O\,Na+C{{H}_{3}}C{{H}_{2}}Cl\xrightarrow[-NaCl]{}\] \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C}}}\,-O+C{{H}_{2}}-C{{H}_{3}}\] is called

  A)
  Williamson synthesis
  done clear
  B)
  Williamson continuous etherification process      
  done clear
  C)
  Etard reaction
  done clear
  D)
  Gatterman-Koch reaction
  done clear
  View Answer play_arrow

• question_answer28) Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?           [NEET 2015 ]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer29) Reaction of phenol with chloroform in the presence of dilute sodium hydroxide finally introduces, which one of the following functional group?                                         [NEET 2015 (Re)]
  A)
  \[-C{{H}_{2}}Cl\]
  done clear
  B)
  – COOH
  done clear
  C)
  \[-CHC{{l}_{2}}\]
  done clear
  D)
  – CHO
  done clear
  View Answer play_arrow

• question_answer30) In an \[{{S}_{N}}1\] reaction on chiral centres there is                                    [NEET 2015 (Re)]
  A)
  100% racemization
  done clear
  B)
  inversion more than retention leading to partial racemization
  done clear
  C)
  100% retention
  done clear
  D)
  100% inversion
  done clear
  View Answer play_arrow

• question_answer31) 

  For the following reactions :-      [NEET - 2016]

  \[~C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\text{ }+\text{ }KOH\to \]\[C{{H}_{3}}CH=C{{H}_{2}}+KBr\text{ }+\text{ }{{H}_{2}}O\]

  Which of the following statements is correct?

  A)
  and are elimination reaction and is addition reaction
  done clear
  B)
  is elimination, is substitution and is addition reaction
  done clear
  C)
  is elimination, and are substitution reactions
  done clear
  D)
  is substitution, and are addition reaction
  done clear
  View Answer play_arrow

• question_answer32) 

  Identify A and predict the type of reaction  [NEET-2017]

  A)
   
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer33) An example of a sigma bonded organometallic compound is                         [NEET-2017]
  A)
  Cobaltocene
  done clear
  B)
  Ruthenocene
  done clear
  C)
  Grignard's reagent
  done clear
  D)
  Ferrocene
  done clear
  View Answer play_arrow

• question_answer34) Hydrocarbon reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. is    [NEET - 2018]
  A)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{-C}{{\text{H}}_{\text{3}}}\]
  done clear
  B)
  \[\text{C}{{\text{H}}_{\text{2}}}\text{=C}{{\text{H}}_{\text{2}}}\]
  done clear
  C)
  \[\text{CH}\equiv \text{CH}\]
  done clear
  D)
  \[\text{C}{{\text{H}}_{\text{4}}}\]
  done clear
  View Answer play_arrow

• question_answer35) Among the following, the reaction that proceeds through an electrophilic substitution, is- [NEET 2019]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer36) An alkene “A” on reaction with \[{{O}_{3}}\]and \[Zn+{{H}_{2}}O\]gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is:              [NEET 2019]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer37) Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:       [NEET 2020]
  A)
  Sec. butyl alcohol
  done clear
  B)
  Tert. butyl alcohol
  done clear
  C)
  Isobutyl alcohol
  done clear
  D)
  Isopropyl alcohol
  done clear
  View Answer play_arrow