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JEE Main Chemistry · Aldehydes & Ketones · Set 3 (Q61-90)

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  1. 61.
    What is the reagent used in Etard reaction?
    1. (1)
    2. (2)
    3. (3) and
    4. (4)
  2. 62.
    Consider the reactions,
    Identify and
    1. (1)‐Methoxymethane, ‐Ethanol,‐Ethanoic acid, Z‐Semicarbazide.
    2. (2)‐Ethanal, ‐Ethanol, Y‐But‐2‐enal, ‐Semicarbazone.
    3. (3)‐Ethanol, ‐Acetaldehyde,‐Butanone, ‐Hydrazone.
    4. (4)‐Methoxymethane, ‐Ethanoic acid, ‐Acetate ion, ‐
  3. 63.
    What is the product in the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 64.
    Reduction by of hydrolysed product of an ester gives
    1. (1)two alcohols
    2. (2)two aldehydes
    3. (3)one acid and one alcohol
    4. (4)two acids.
  5. 65.
    When aniline reacts with oil of bitter almonds condensation takes place and benzal derivative is formed. This is known as
    1. (1)Schiff’s base
    2. (2)Benedict’s reagent
    3. (3)Millon’s base
    4. (4)Schiff’s reagent.
  6. 66.
    The correct structure of the product formed in the reaction [NEET 2016]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 67.
    The reagent which can be used to distinguish acetophenone from benzophenone is
    1. (1)2,4‐dinitrophenylhydrazine
    2. (2)aqueous solution of
    3. (3)Benedict reagent
    4. (4) and NaOH. (1990)/C H2−0
  8. 68.
    Which one among the following reaction products gives iodoform test?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 69.
    First product of the reaction between RCHO and is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 70.
    In the following reaction product is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 71.
    Arrange the following in increasing order of their reactivity for nucleophilic addition reaction
    1. (1)(i) (ii) (iii) (iv)
    2. (2)(i) < (iv) < (iii) < (ii)
    3. (3)(iii) (ii) (i) (iv)
    4. (4)(iii) (i) (ii) (iv)
  12. 72.
    What is the IUPAC name of the organic compound formed in the following chemical
    reaction? [NEET 2021]
    1. (1)2-methyl propan 2-ol
    2. (2)pentan-2-ol
    3. (3)pentan-3-ol
    4. (4)2-methyl butan-2-ol
  13. 73.
    Which of the following compounds does not undergo haloform reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 74.
    Positive Tollen’s test is observed for :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 75.
    The main reactants involved in Etard reaction are
    1. (1)Toluene
    2. (2)Toluene
    3. (3)Toluene
    4. (4)Benzene Anhy
  16. 76.
    The major product of the following reactions is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  17. 77.
    Which of the following arrangements with respect to their reactivity in nucleophilic
    addition reaction is correct?
    1. (1)acetophenone benzaldehyde p-tolualdehyde p- nitrobenzaldehyde
    2. (2)benzaldehyde acetophenone p-nitrobenzaldehyde -tolualdehyde
    3. (3)p- nitrobenzaldehyde benzaldehyde p-tolualdehyde acetophenone
    4. (4)acetophenone p-tolualdehyde benzaldehyde - nitrobenzaldehyde
  18. 78.
    Treatment of cyclopentanone with methyl
    lithium gives which of the following species?
    1. (1)Cyclopentanonyl anion
    2. (2)Cyclopentanonyl cation
    3. (3)Cyclopentanonyl radical
    4. (4)Cyclopentanonyl biradical
  19. 79.
    Choose the incorrect statement among the following.
    A. The reactivity of aromatic aldehydes and ketones is less than that of aliphatic carbonyl compounds toward nucleophilic addition reactions.
    B. Benzaldehyde does not give Fehling's test.
    C. The -atoms in ethanal are acidic in nature.
    D. p-nitrobenzaldehyde is less reactive than benzaldehyde towards nucleophilic addition reactions.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 80.
    An organic compound having molecular formula yields phenyl hydrazone and
    gives negative response to the iodoform test and Tollen's test. It produces -pentane on reduction. could be
    1. (1)pentanal
    2. (2)2-pentanone
    3. (3)3-pentanone
    4. (4)n-amyl alcohol
  21. 81.
    Which one of the following can be oxidised to the corresponding carbonyl
    compound?
    1. (1)2‐Hydroxypropane
    2. (2)ortho‐Nitrophenol
    3. (3)Phenol
    4. (4)2‐Methyl‐2‐hydroxypropane
  22. 82.
    Which of the following reactions will give benzophenone as major product?(A) Benzoyl chloride + Benzene (anhyd.)(B) Benzoyl chloride + Phenylmagnesium bromide (excess)(C) Benzoyl chloride + Diphenyl cadmium
    1. (1)A and B only
    2. (2)B and C only
    3. (3)A and C only
    4. (4)A, B and C
  23. 83.
    The major product of the following reaction is: ?
    1. (1)
    2. (2)- - -OH
    3. (3)
    4. (4)
  24. 84.
    Identify the reaction in which carbonyl group of aldehydes and ketones is reduced to methylene group on treatment with hydrazine followed by heating with sodium hydroxide in ethylene glycol.
    1. (1)Wolff-Kishner reduction
    2. (2)Clemmensen reduction
    3. (3)Stephen reaction
    4. (4)Etard reaction
  25. 85.
    Consider the following reactions,

    What are the structures of and ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  26. 86.
    A mixture of benzaldehyde and formaldehyde when treated with yields
    1. (1)sodium benzoate and sodium formate
    2. (2)sodium formate and benzyl alcohol
    3. (3)sodium benzoate and methyl alcohol
    4. (4)benzyl alcohol and methyl alcohol.
  27. 87.
    Which of the following compounds when treated with dibenzyl cadmium yields benzyl methyl ketone?
    1. (1)Acetone
    2. (2)Acetaldehyde
    3. (3)Acetic acid
    4. (4)Acetyl chloride
  28. 88.
    In the Claisen-Schmidt reaction to prepare of dibenzalacetone using of acetone, the amount of benzaldehyde required is _____g. (Nearest integer)
  29. 89.
    Among the following the number of compounds which will give positive iodoform reaction is_____.
    (a) l-Phenylbutan-2-one
    (b) 2-Methylbutan-2-ol
    (c) 3-Methylbutan-2-ol
    (d) 1-Phenylethanol
    (e) 3, 3-dimethylbutan-2-one
    (f) l-Phenylpropan-2-ol
  30. 90.
    In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula per aldehyde group to form silver mirror isoff to the Nearest integer)