Solved papers for NEET Chemistry NEET PYQ-Carboxylic Acids

done NEET PYQ-Carboxylic Acids Total Questions - 30

• question_answer1) An ester with molecular formula \[{{C}_{9}}{{H}_{10}}{{O}_{2}}\] was treated with excess of \[C{{H}_{3}}MgBr\] and the complex so formed was treated with \[{{H}_{2}}S{{O}_{4}}\] to give an olefin . Ozonolysis of gave a ketone with molecular formula \[{{C}_{8}}{{H}_{8}}O\] which shows +ve iodoform test. The structure of is: [AIPMT 1998]
  A)
  \[{{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}}\]
  done clear
  B)
  \[{{C}_{6}}{{H}_{5}}COO{{C}_{6}}{{H}_{5}}\]
  done clear
  C)
  \[{{H}_{3}}COC{{H}_{2}}CO{{C}_{6}}{{H}_{5}}\]  
  done clear
  D)
  \[p-{{H}_{3}}CO-{{C}_{6}}{{H}_{4}}-COC{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer2) Which one of the following esters cannot undergo Claisen self-condensation?          [AIPMT 1998]
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
  done clear
  B)
  \[{{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}}\]
  done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]            
  done clear
  D)
  \[{{C}_{6}}{{H}_{11}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer3) Aspirin is an acetylation product of: [AIPMT 1998]
  A)
  o-hydroxybenzoic acid
  done clear
  B)
  o-hydroxybenzene
  done clear
  C)
  m-hydroxybenzoic acid               
  done clear
  D)
  p-dihydroxybenzene
  done clear
  View Answer play_arrow

• question_answer4) Which one of the following compounds will react with \[NaHC{{O}_{3}}\] solution to give sodium salt and carbon dioxide?                                  [AIPMT 1999]
  A)
  Acetic acid
  done clear
  B)
  n-hexanol
  done clear
  C)
  Phenol
  done clear
  D)
  Both [b] and [c]
  done clear
  View Answer play_arrow

• question_answer5) Reduction by \[LiAl{{H}_{4}}\] of hydrolysed product of an ester gives:                              [AIPMT 2000]
  A)
  two acids
  done clear
  B)
       two aldehydes
  done clear
  C)
  one molecule of alcohol and another of carboxylic acid
  done clear
  D)
  two alcohols
  done clear
  View Answer play_arrow

• question_answer6) Benzoic acid may be converted to ethyl benzoate by reaction with:                           [AIPMT 2000]
  A)
  sodium ethoxide
  done clear
  B)
  ethyl chloride     
  done clear
  C)
  dry \[HCl-{{C}_{2}}{{H}_{s}}OH\]
  done clear
  D)
  ethanol
  done clear
  View Answer play_arrow

• question_answer7) 

  In a set of the given reactions, acetic acid yielded a product C,

  \[C{{H}_{3}}COOH+PC{{l}_{5}}\to A\xrightarrow[Anh.\,AlC{{l}_{3}}]{{{C}_{6}}{{H}_{6}}}\]\[B\underset{Ether}{\mathop{\xrightarrow{{{C}_{2}}{{H}_{5}}MgBr}}}\,C\] product C would be :                  [AIPMT 2003]

  A)
        \[C{{H}_{3}}CH(OH){{C}_{6}}{{H}_{5}}\]    
  done clear
  B)
  \[C{{H}_{3}}-\overset{\begin{smallmatrix}  {{C}_{2}}{{H}_{5}} \\  | \end{smallmatrix}}{\mathop{C(OH){{C}_{6}}{{H}_{5}}}}\,\]
  done clear
  C)
  \[C{{H}_{3}}CH(OH){{C}_{2}}{{H}_{5}}\]
  done clear
  D)
  \[C{{H}_{3}}CO{{C}_{6}}{{H}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer8) The\[-OH\]group of an alcohol or the \[-COOH\]group of a carboxylic acid can be replaced by\[-Cl\]using: [AIPMT (S) 2004]
  A)
  phosphorus pentachloride
  done clear
  B)
  hypochlorous acid
  done clear
  C)
  chlorine
  done clear
  D)
  hydrochloric acid
  done clear
  View Answer play_arrow

• question_answer9) 

  In a set of reactions, acetic acid yielded a product D.           [AIPMT (S) 2005]

  \[C{{H}_{3}}COOH\xrightarrow[{}]{SOC{{l}_{2}}}A\underset{Anhyd.\,AlC{{l}_{3}}}{\mathop{\xrightarrow{Benzene}}}\,B\xrightarrow[{}]{HCN}C\xrightarrow[{}]{HOH}D\]

  The structure of D would be:

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

• question_answer10) Which one of the following compounds is most acidic?                                     [AIPMT (S) 2005]
  A)
  \[Cl-C{{H}_{2}}-C{{H}_{2}}-OH\]
  done clear
  B)
  
  done clear
  C)
      
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer11) The enthalpy of combustion of H2, cyclohexene (C6H10) and cyclohexene (C6H12) are -241, -3800 and -3920 kJ per mol respectively. Heat of hydrogenation of cyclohexene is: [AIPMT (S) 2006]
  A)
  -121 kJ per mol
  done clear
  B)
  +121 kJ per mol
  done clear
  C)
  +242 kJ per mol
  done clear
  D)
  -242 kJ per mol
  done clear
  View Answer play_arrow

• question_answer12) Self-condensation of two moles of ethyl acetate in presence of sodium ethoxide yields: [AIPMT (S) 2006]
  A)
  ethyl butyrate                
  done clear
  B)
  acetoacetic ester
  done clear
  C)
  methyl acetoacetate
  done clear
  D)
  ethyl propionate
  done clear
  View Answer play_arrow

• question_answer13) 

  Consider the following compounds:             [AIPMT (S) 2007]

  (i) \[{{C}_{6}}{{H}_{5}}COCl\]

  (ii)

  (iii)

  (iv)

  The correct decreasing order of their reactivity towards hydrolysis is:

  A)
        (ii) > (iv) > (iii) > (i)  
  done clear
  B)
  (i) > (ii) > (iii) > (iv)
  done clear
  C)
  (iv) > (ii) > (i) > (iii)
  done clear
  D)
   (ii) > (iv) > (i) > (iii)
  done clear
  View Answer play_arrow

• question_answer14) The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of [AIPMT (S) 2008]
  A)
  Acyl chloride > Acid anhydride > Ester > Amide
  done clear
  B)
  Ester > Acyl chloride > Amide >Acid anhydride
  done clear
  C)
  Acid anhydride > Amide, > Ester > Acyl chloride
  done clear
  D)
  Acyl chloride > Ester > Acid anhydride > Amide
  done clear
  View Answer play_arrow

• question_answer15) Propionic acid with \[B{{r}_{2}}-P\] yields a dibromo product. Its structure would be [AIPMT (S) 2009]
  A)
  \[\frac{d[B{{r}_{2}}]}{dt}=\frac{5}{3}\frac{d[B{{r}^{-}}]}{dt}\]
  done clear
  B)
  \[\frac{d[B{{r}_{2}}]}{dt}=\frac{3}{5}\frac{d[B{{r}^{-}}]}{dt}\]
  done clear
  C)
  \[B{{F}_{3}},NO_{2}^{-},NH_{2}^{-}\]
  done clear
  D)
  \[{{H}_{2}}O,\]
  done clear
  View Answer play_arrow

• question_answer16) Which one of the following compounds has the most acidic nature?       [AIPMT (S) 2010]
  A)
  
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer17) 

  In a set of reactions, ethyl benzene yielded a product D.                        [AIPMT (S) 2010]

  'D' would be

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

• question_answer18) Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine? [AIPMT (S) 2010]
  A)
  \[NaOH-B{{r}_{2}}\]
  done clear
  B)
  Sodalime
  done clear
  C)
  Hot conc\[{{H}_{2}}S{{O}_{4}}\]
  done clear
  D)
  \[PC{{l}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer19) Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is [AIPMT (S) 2010]
  A)
  \[C{{H}_{3}}COOC{{H}_{3}}\]
  done clear
  B)
  \[C{{H}_{3}}CON{{H}_{2}}\]
  done clear
  C)
  \[C{{H}_{3}}COOCOC{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}COCl\]
  done clear
  View Answer play_arrow

• question_answer20) 

  Among the following four compounds [AIPMT (M) 2010]

  A. Phenol

  B. Methyl phenol

  C. meta-nitrophenol

  D. para nitrophenol the acidity order is

  A)
  \[D>C>A>B\]
  done clear
  B)
  \[C>D>A>B\]
  done clear
  C)
  \[A>D>C>B\]
  done clear
  D)
  \[B>A>C>D\]
  done clear
  View Answer play_arrow

• question_answer21) 

  Match the compounds given in list I with list II and select the suitable option using the code given bellows. [AIPMT (M) 2011]

  List I List II A. Benzaldehyde B. Phthalic anhydride C. Phenyl benzoate D. Methyl salicylate 1. Phenolphthalein 2. Benzoin condensation 3. Oil wintergreen 4. Fries rearrangement

  Code
  A)
  A-4, B-1, C-3, D-2
  done clear
  B)
  A-4, B-2, C-3, D-1
  done clear
  C)
  A-2, B-3, C-4, D-1
  done clear
  D)
  A-2, B-1, C-4, D-3
  done clear
  View Answer play_arrow

• question_answer22) 

  In the following sequence of reactions,                                           [AIPMT (S) 2012]

  \[C{{H}_{3}}-Br\xrightarrow[{}]{KCN}A\xrightarrow[{}]{{{H}_{3}}{{O}^{+}}}B\xrightarrow[ether]{LiAl{{H}_{4}}}C\] the end product is

  A)
  acetone
  done clear
  B)
  methane
  done clear
  C)
  acetaldehyde
  done clear
  D)
  ethyl alcohol
  done clear
  View Answer play_arrow

• question_answer23) 

  Consider the following reaction [AIPMT (M) 2012]

  The product 'A' is

  A)
  \[{{C}_{6}}{{H}_{5}}CHO\]
  done clear
  B)
  \[{{C}_{6}}{{H}_{5}}OH\]
  done clear
  C)
  \[{{C}_{6}}{{H}_{5}}COC{{H}_{3}}\]
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}Cl\]
  done clear
  View Answer play_arrow

• question_answer24) Which of the following compounds will give a yellow precipitate with iodine and alkali? [AIPMT (M) 2012]
  A)
  Acetophenone
  done clear
  B)
  Methyl acetate
  done clear
  C)
  Acetamide
  done clear
  D)
  2-hydroxypropane
  done clear
  View Answer play_arrow

• question_answer25) Reaction by which benzaldehyde cannot be prepared?                                  [NEET 2013]
  A)
   
  done clear
  B)
   
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer26) Which one of the following esters gets hydrolysed most easily under alkaline conditions? [NEET 2015 (Re)]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer27) 

  The following reaction,          [NEET 2015 (Re)]

  is known by the name

  A)
  Friedel-Crafts reaction
  done clear
  B)
  Perkins reaction
  done clear
  C)
  Acetylation reaction
  done clear
  D)
  Schotten-Baumann reaction
  done clear
  View Answer play_arrow

• question_answer28) A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{o}}_{\text{4}}}\]. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be [NEET - 2018]
  A)
  2.8
  done clear
  B)
  3.0
  done clear
  C)
  1.4
  done clear
  D)
  4.4
  done clear
  View Answer play_arrow

• question_answer29) 

  In the reaction

  The electrophile involved is                  [NEET - 2018]

  A)
  Dichloromethyl anion \[\left( \begin{align}   & \oplus  \\  & \text{CHC}{{\text{l}}_{\text{2}}} \\ \end{align} \right)\]
  done clear
  B)
  Formyl cation \[\left( \begin{align}   & \oplus  \\  & \text{CHO} \\ \end{align} \right)\]
  done clear
  C)
  Dichloromethyl cation \[\left( \begin{align}   & \oplus  \\  & \text{CHC}{{\text{l}}_{2}} \\ \end{align} \right)\]
  done clear
  D)
  Dichlorocarbene \[\text{(:CC}{{\text{l}}_{\text{2}}})\]
  done clear
  View Answer play_arrow

• question_answer30) Compound \[\text{A,}{{\text{C}}_{\text{8}}}{{\text{H}}_{\text{10}}}\text{O,}\] is found to react with \[\text{NaOI}\] (produced by reacting Y with\[\text{NaOH}\]) and yields a yellow precipitate with characteristic smell. A and Y are respectively [NEET - 2018]
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow