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JEE Main Chemistry · Aldehydes & Ketones · Set 4 (Q91-120)

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  1. 91.
    Which of the following reactions will not result in the formation of carbon‐carbon bonds?
    1. (1)Reimer‐Tiemann reaction
    2. (2)Cannizzaro reaction
    3. (3)Wurtz reaction
    4. (4)Friedel‐Crafts acylation
  2. 92.
    Which among the following aldehydes is most reactive towards nucleophilic addition reactions?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 93.
    The major product obtained from the following reaction is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 94.
    The major product in the following transformation is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  5. 95.
    Which one of the following compounds will be most readily dehydrated?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 96.
    Which alkene on ozonolysis gives and ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 97.
    The major product of the following reaction is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 98.
    What is the number of different products formed when mixture of ethanal and propanal reacts with aq. after warming?
    1. (1)1
    2. (2)3
    3. (3)2
    4. (4)4
  9. 99.
    The reagent used in Wolff-Kishner reduction is
    1. (1) and in ethylene glycol
    2. (2) conc.
    3. (3)
    4. (4)
  10. 100.
    What are ' ' and ' ' respectively in the following reaction sequence?
    1. (1)X=PCC; Y= (i)
      (ii)
    2. (2)X= (i) ;
      (ii)
    3. (3)X= (i) ; Y= (i)
      (ii) H3O+ (ii) H3O+
    4. (4);
  11. 101.
    Identify product (A) in the following reaction. [NEET 2023]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 102.
    In the following reaction
    Carbonyl compound + MeOHacetal
    Rate of the reaction is the highest for :
    1. (1)Acetone as substrate and methanol in excess.
    2. (2)Propanal as substrate and methanol in stoichiometric amount.
    3. (3)Propanalas substrate and methanol in excess.
    4. (4)Acetone as substrate and methanol in stoichiometric amount.
  13. 103.
    The major product of the following reaction is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 104.
    The compound A, reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A on reaction with conc. NaOH forms a substituted benzyl alcohol as one of the two products. The compound A is:
    1. (1)2-hydroxy acetophenone
    2. (2)4-methyl benzoic acid
    3. (3)4-methoxy benzaldehyde
    4. (4)4-hydroxy benzaldehyde
  15. 105.
    Arrange the following in the correct order of their reactivity towards nucleophilic addition reactions
    1. (1)I III IV II
    2. (2)IV II I III
    3. (3)II III I IV
    4. (4)III I IV II
  16. 106.
    Which of the following compounds will give positive iodoform test?
    1. (1)Isopropyl alcohol
    2. (2)Propionaldehyde
    3. (3)Ethylphenyl ketone
    4. (4)Benzyl alcohol
  17. 107.
    In the following reaction Aldehyde + Alcohol Acetal
    Aldehyde Alcohol
    HCHO tBuOH
    MeOH
    The best combination is :
    1. (1) and BuOH
    2. (2)
    3. (3) and MeOH
    4. (4)HCHO and BuOH
  18. 108.
    A compound gives a positive test with and is extracted from benzene by saturated . The compound is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 109.
    Nucleophilic addition reaction will be most favoured in
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 110.
    The oxidation of toluene to benzaldehyde by chromyl chloride is called
    1. (1)Etard reaction
    2. (2)Riemer‐Tiemann reaction
    3. (3)Wurtz reaction
    4. (4)Cannizzaro’s reaction.
  21. 111.
    Identify compound in the following sequence of reactions. [NEET 2020]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  22. 112.
    Identify and in the following reactions sequence
    1. (1)
    2. (2)
    3. (3) Jones reagent
    4. (4)
  23. 113.
    Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as
    [NEET 2020]
    1. (1)Cannizzaro's reaction
    2. (2)Cross Cannizzaro's reaction
    3. (3)Cross aldol condensation
    4. (4)Aldol condensation
  24. 114.
    Assertion A: Enol form of acetone exists in quantity.
    However, the enol form of acetyl acetone exists in approximately quantity.
    Reason enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding,
    which is not possible in enol form of acetone. Choose the correct statement:
    1. (1) is false but is true
    2. (2)Both and are true and is the correct explanation of
    3. (3)Both and are true but is not the correct explanation of
    4. (4) is true but is false
  25. 115.
    Match List - I with List - II.

    Choose the correct answer from the options given below :
    1. (1)A-IV, B-III, C-I, D-II
    2. (2)A-II, B-IV, C-I, D-III
    3. (3)A-IV, B-I, C-II, D-III
    4. (4)A-II, B-III, C-IV, D-I
  26. 116.
    Which of the following sets is in the correct order regarding the property mentioned against them?
    Sets Property
    I.
    II.
    Reactivity
    III.
    Boiling points
    1. (1)I, II only
    2. (2)I, III only
    3. (3)II, III only
    4. (4)I, II. III
  27. 117.
    Which of the following is a hemiacetal?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  28. 118.
    Fchling's solution " A" is [NEET 2024]
    1. (1)aqueous copper sulphate
    2. (2)alkaline copper sulphate
    3. (3)alkaline solution of sodium potassium tartrate (rochelle's salt)
    4. (4)aqueous sodium citrate
  29. 119.
    Consider the following reactions
    -methyl-butene
  30. 120.
    Number of isomeric compounds with molecular formula which (i) do not dissolve in NaOH (ii) do not dissolve in HCl (iii) do not give orange precipitate with 2, 4 - DNP (iv) on hydrogenation give identical compound with molecular formula is