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Set 9 of 10 · Questions 241-270 of 272

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JEE Main Chemistry · Haloalkanes & Haloarenes · Set 9 (Q241-270)

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  1. 241.
    The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is :
    1. (1)D < A < C < B
    2. (2)B < C < A < D
    3. (3)A < B < C < D
    4. (4)D < B < A < C
  2. 242.
    The compound which is not formed when a mixture of -butyl bromide and ethyl bromide treated with sodium metal in presence of dry ether is
    1. (1)butane
    2. (2)octane
    3. (3)hexane
    4. (4)ethane.
  3. 243.
    Two isomers (a) and (b) with Molar mass 184 g/mol and elemental composition C, 52.2%; H, 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with . Isomer ' is optically active and gives a pale yellow precipitate when warmed with alcoholic . Isomer 'A' and 'B' are, respectively :
    1. (1)C-CHBr- and
    2. (2)
    3. (3)C-CHBr- and
    4. (4)and C-CHBr-
  4. 244.
    What is the IUPAC name of the following compound?
    1. (1)2-Bromo-4,4,6-trimethyl octane
    2. (2)3-Bromo-5,5,7-trimethyl octane
    3. (3)2-Bromo-4,4,6-trimethyl nonane
    4. (4)3-Bromo-5,5,7-trimethyl nonane
  5. 245.
    The major product (P) in the reaction

    [Ph is – ] is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 246.
    Compound 'A' undergoes following sequence of reactions to give compound 'B'. The correct structure and chirality of compound 'B' is: [where Et is -]

    Compound ‘A’
    1. (1), Achiral
    2. (2), Chiral
    3. (3), Chiral
    4. (4), Achiral
  7. 247.
    In the following sequence of reactions the is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 248.
    The major product obtained in the given reaction is :
    Product
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 249.
    Sodium tertiary butoxide on reaction with methyl bromide produced the product .
    Sodium methoxide upon reaction with tertiary butyl bromide generated the product .
    The products and are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 250.
    The product and formed in above reactions are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 251.
    p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 252.
    Identify the correct set of reagents or reaction conditions ' and ' in the following set of transformation
    1. (1)X= dil.aq. ,
    2. (2)X= conc.alc. NaOH,80∘C,
    3. (3)X= dil.aq. /acetic acid
    4. (4)X= conc.alc. / acetic acid
  13. 253.
    The dibromo compound (molecular formula: ) when heated with excess sodamide followed by treatment with dilute HCl gives . On warming with mercuric sulphate and dilute sulphuric acid yield which gives positive lodoform test but negative Tollen's test. The compound is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 254.
    How many asymmetric carbons are present in the following molecule?
    1. (1)3
    2. (2)1
    3. (3)4
    4. (4)2
  15. 255.
    has a chiral centre. Which one of the following represents its R‐configuration?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 256.
    ' ' is an optically active alkane having lowest molecular mass. Predict the structure of the major product obtained on monochlorination of ' '.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  17. 257.
    The correct order of melting point of dichlorobenzenes is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 258.
    The stable carbocation formed in the above reaction is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 259.
    The structure of product C, formed by the following sequence of reactions is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 260.
    Decomposition of benzene diazonium chloride by using to form chlorobenzene is
    1. (1)Raschig's reaction
    2. (2)Sandmeyer's reaction
    3. (3)Kolbe's reaction
    4. (4)Cannizzaro's reaction.
  21. 261.
    Choose the correct set of reagents for the following conversion
    1. (1) anhy ; alc. KOH
    2. (2) anhy. aq. KOH
    3. (3); alc. KOH
    4. (4) anhy. ; aq. KOH
  22. 262.
    Phosgene is a common name for
    1. (1)phosphoryl chloride
    2. (2)thionyl chloride
    3. (3)carbon dioxide and phosphine
    4. (4)carbonyl chloride.
  23. 263.
    This reaction is known as
    1. (1)Wurtz-Fittig reaction
    2. (2)Wurtz reaction
    3. (3)Fittig reaction
    4. (4)Friedel-Crafts reaction
  24. 264.
    Fitting reaction is
    1. (1)Reaction between two aryl halides in the presence of dry ether
    2. (2)Reaction between two alkyl halides in the presence of dry ether
    3. (3)Reaction between aryl halide and alkyl halide in the presence of dry ether
    4. (4)Reaction between two aryl halides in the presence of dry ether
  25. 265.
    The correct IUPAC name of
    1. (1)4-ethyl-1-fluoro-2-nitrobenzene
    2. (2)1-ethyl-4-fluoro-3-nitrobenzene
    3. (3)3-ethyl-6-fluoronitrobenzene
    4. (4)5-ethyl-2-fluoronitrobenzene.
  26. 266.
    Acid D formed in above reaction is :
    1. (1)Gluconic acid
    2. (2)Succinic acid
    3. (3)Oxalic acid
    4. (4)Malonic acid
  27. 267.
    (intramolecular products)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  28. 268.
    Chlorocyclohexane is
    1. (1)Primary alkyl halide
    2. (2)Tertiary alkyl halide
    3. (3)Allylic halide
    4. (4)Secondary alkyl halide
  29. 269.
    In the given reaction

    'A' can be
    1. (1)benzyl bromide
    2. (2)bromobenzene
    3. (3)cyclohexyl bromide
    4. (4)methyl bromide
  30. 270.
    The major products from the following reaction sequence are product and product .

    The total sum of electrons in product and product are_____(nearest integer)