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Set 9 of 10 · Questions 241-270 of 285

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JEE Main Chemistry · Aldehydes & Ketones · Set 9 (Q241-270)

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  1. 241.
    Assertion : Dimethylsulphide is commonly used for the reduction of an ozonide of an alkene to get the carbonyl compounds
    Reason : It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates
    1. (1)Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
    2. (2)Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion.
    3. (3)Assertion is True, Reason is False.
    4. (4)Assertion is False, Reason is True.
  2. 242.
    What is the major product of the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 243.
    Which will have the highest enol content ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 244.
    The compound that yields only ketonic compound/s on ozonolysis is
    1. (1)but-2-ene
    2. (2)pent-2ene
    3. (3)2,3-dimethylbut-2-ene
    4. (4)2-methylbut-2-ene,
  5. 245.
    The major product in the following reaction sequence is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 246.
    Which of the following conditions or reaction sequence will NOT give acetophenone as the major product ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 247.
    Benzene on reaction with acetyl chloride in the presence of anhydrous gave the product . The product on reaction with methyl magnesium bromide followed by treatment with water furnished the product . The molecular formula of is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 248.
    Identify in the following reaction sequence
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 249.
    and in the following reactions are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 250.
    Identify ' ' in the following reaction:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 251.
    Predict the correct intermediate and product in the following reaction. [NEET 2017]
    Intermediate → Product
    (A) (B)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 252.
    Identify substrate ' ' in the following reaction.
    1. (1)Ethyl chloride
    2. (2)Ethylene dichloride
    3. (3)Ethanoyl chloride
    4. (4)Ethylidene dichloride
  13. 253.
    Identify the reagents and respectively in the following reactions.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 254.
    The major product in the following reaction is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 255.
    Match List - I with List -II.

    Choose the correct answer from options given below:
    1. (1)A-(III), (B)-(IV), (C)-(I), (D)-(II)
    2. (2)A-(IV), (B)-(II), (C)-(I), (D)-(III)
    3. (3)A-(IV), (B)-(II), (C)-(III), (D)-(I)
    4. (4)A-(III), (B)-(IV), (C)-(II), (D)-(I)
  16. 256.
    The reagent needed for converting
    is :
    1. (1)Cat. Hydrogenation
    2. (2)/Lindlar Cat.
    3. (3)Li/
    4. (4)
  17. 257.
    'R' formed in the following sequence of reaction is: o
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 258.
    The ' ' in the following conversion is
    1. (1)(i) red, (ii)
    2. (2)(i) , (ii)
    3. (3)
    4. (4)
  19. 259.
    L-isomer of a compound 'A' () gives a positive test with [Ag()]. Treatment of 'A' with acetic anhydride yield triacetate derivative. Compound 'A' produces an optically active compound (b) and an optically inactive compound (c) on treatment with bromine water and respectively, compound (a) is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 260.
    Identify the compound ' ' in above mentioned series of reactions.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  21. 261.
    The major products and in the following reaction sequences are

    P Q
    1. (1)3-methylpentanol
      Ethanol
    2. (2)3-methylpentanal
      Ethanal
    3. (3)3-methylbutanol
      Ethanol
    4. (4)3-methylbutanal
      Ethanal
  22. 262.
    Which of the following is an example of conjugated diketone?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 263.
    Isobutyraldehyde on reaction with formaldehyde and gives compound A’ Compound 'A' reacts with KCN and yields compound 'B' which on hydrolysis gives a stable compound 'C'. The compound 'C' is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 264.
    In the following reactions, products A and B are:

    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 265.
    The structures of major products A, B and C in the following reaction are sequence.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  26. 266.
    Which of the following compound can give positive iodoform test when treated with aqueous solution followed by potassium hypoiodite.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  27. 267.
    The major product of the following reaction is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  28. 268.
    The correct set of reagents which convert acetylene to but-2-enal are
    1. (1)
    2. (2), dil. NaOH
    3. (3), conc. NaOH
    4. (4)
  29. 269.
    Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous after heating gives as the major product. The number of bonds in the product is _____
  30. 270.
    In the given reaction

    (Where Et is -)
    The number of chiral carbon/s in product A is