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JEE Main Chemistry · Aldehydes & Ketones · Set 5 (Q121-150)

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  1. 121.
    The major product of the following reaction is: cannot be prepared by :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 122.
    Aldehydes or ketones when treated with , the product formed is
    1. (1)semicarbazone
    2. (2)phenylhydrazone
    3. (3)hydrazine
    4. (4)oxime
  3. 123.
    Acetaldehyde reacts with
    1. (1)electrophiles only
    2. (2)nucleophiles only
    3. (3)free radicals only
    4. (4)both electrophiles and nucleophiles.
  4. 124.
    Trichloroacetaldehyde was subjected to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate ion and another compound. The other compound is
    1. (1)2, 2, 2–Trichloroethanol
    2. (2)Trichloromethanol
    3. (3)2, 2, 2–Trichloropropanol
    4. (4)Chloroform
  5. 125.
    What type of reaction is the formation of aldol from aldehyde?
    1. (1)Condensation reaction
    2. (2)Addition reaction
    3. (3)Substitution reaction
    4. (4)Elimination reaction
  6. 126.
    Which of the following is incorrect?
    1. (1) is used in detection of phenol.
    2. (2)Fehling solution is used in detection of glucose.
    3. (3)Tollens’ reagent is used in detection of unsaturation.
    4. (4) is used in detection of carbonyl compound.
  7. 127.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 128.
    Bouveault-Blanc reduction reaction involves:
    1. (1)Reduction of an anhydride with .
    2. (2)Reduction of an ester with Na/OH.
    3. (3)Reduction of a carbonyl compound with Na/Hg and HCl.
    4. (4)Reduction of an acyl halide with /Pd
  9. 129.
    A in the above reaction is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 130.
    Which of the following reagent is used for the following reaction?
    1. (1)Potassium permanganate
    2. (2)Molybdenum oxide
    3. (3)Copper at high temperature and pressure
    4. (4)Manganese acetate
  11. 131.
    Iodoform test is not given by
    1. (1)ethanal
    2. (2)ethanol
    3. (3)2‐pentanone
    4. (4)3‐pentanone
  12. 132.
    Experimentally reducing a functional group cannot be done by which one of the following reagents ?
    1. (1)Pt-C/
    2. (2)Na/
    3. (3)Pd-C/
    4. (4)Zn/O
  13. 133.
    The most suitable reagent for the conversion of R–CH2–OH → R–CHO is
    1. (1)KMnO4
    2. (2)K2Cr2O7
    3. (3)CrO3
    4. (4)PCC (Pyridinium Chlorochromate)
  14. 134.
    The correct structure of the product ‘A’ formed in the reaction
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 135.
    When ‐chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 136.
    The number of products obtained in the following reaction is
    1. (1)1
    2. (2)3
    3. (3)2
    4. (4)4
  17. 137.
    Which of the following reagents would distinguish cis‐cyclopenta‐l,2‐diol from the trans‐isomer?
    1. (1)
    2. (2)Aluminium isopropoxide
    3. (3)Acetone
    4. (4)Ozone
  18. 138.
    What is in the following sequence of reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 139.
    Given below are two statements :
    Statement I: The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
    Statement II: The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
    choose the most appropriate answer from the options given below :
    1. (1)Both Statement I and Statement II are true.
    2. (2)Statement I is true but Statement II is false.
    3. (3)Statement I is false but Statement II is true.
    4. (4)Both Statement I and Statement II are false.
  20. 140.
    The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha
    carbon, is [NEET 2016]
    1. (1)a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.
    2. (2)a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism.
    3. (3)a carbonyl compound with a hydrogen atom on its alpha carbon never equilibrates with its corresponding enol.
    4. (4)a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.
  21. 141.
    An organic compound on treatment with gives , which on heating gives when treated with in the presence of KOH produces ethyl amine. Compound is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  22. 142.
    But-1-ene may be converted to butane by reaction with :
    1. (1)Zn–HCl
    2. (2)Sn–HCl
    3. (3)Zn–Hg
    4. (4)Pd/
  23. 143.
    What are and respectively in the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 144.
    Identify the major product from the following reaction sequence
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 145.
    Amongst the following the reagent that would convert 2-hexyne into trans-2-hexene is
    1. (1) .Pt /
    2. (2) .Pd / SO
    3. (3)Li / / OH
    4. (4)
  26. 146.
    The value of x in compound 'D' is____
  27. 147.
    Identify the structure of the final product (D) in the following sequence of the reactions:

    Total number of hybridised carbon atoms in product is .
  28. 148.
    The number of chiral centers present in is

  29. 149.
    The product of the following reaction is .

    The number of hydroxyl groups present in the product is_______
  30. 150.
    The number of molecules which gives haloform test among the following molecules is______.