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Set 10 of 16 · Questions 271-300 of 459

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JEE Main Chemistry · Hydrocarbons · Set 10 (Q271-300)

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  1. 271.
    Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following reactions?
    1. (1)Claisen
    2. (2)Friedel-craft
    3. (3)Sandmeyer
    4. (4)Wurtz
  2. 272.
    Complete reduction of benzene-diazonium chloride with Zn/HCl gives
    1. (1)Aniline
    2. (2)Phenylhydrazine
    3. (3)Azobenzene
    4. (4)Hydrazobenzene
  3. 273.
    Which of the following sequence of reactions (reagents) can be used for the conversion of C6H5CH2CH3 into C6H5CH = CH2?
    1. (1)SOCl2 ; H2O
    2. (2)SO2Cl2 ; alc. KOH
    3. (3)Cl2 / hν ; H2O
    4. (4)SOCl2 ; alc. KOH
  4. 274.
    Propan–1–ol may be prepared by reaction of propene with
    1. (1)
    2. (2)H3BO3
    3. (3)B2H6/NaOH-H2O2
    4. (4)H2SO4/H2O
  5. 275.
    Among the following alkenes,
    1-butene cis-2-butene trans-2-butene
       I II   III
    the decreasing order of stability is :
    1. (1)II > I > III
    2. (2)III > II > I
    3. (3)III > I > II
    4. (4)I > II > III
  6. 276.
    Nitrobenzene given N-phenylhydroxylamine by :
    1. (1)Sn/HCl
    2. (2)H2/Pd-C
    3. (3)Zn/NaOH
    4. (4)Zn/NH4Cl
  7. 277.
    Toluene reacts with halogen in presence of iron (III) chloride giving ortho and parahalo compounds. The reaction is
    1. (1)free radical addition reaction
    2. (2)electrophilic elimination reaction
    3. (3)nucleophilic substitution reaction
    4. (4)electrophilic substitution reaction.
  8. 278.
    Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains :
    1. (1)mixture of o- and p-dibromobenzenes
    2. (2)mixture of o- and p-bromoanilines
    3. (3)mixture of o- and m-bromotoluenes
    4. (4)mixture of o- and p-bromotoluenes
  9. 279.
    Aniline is prepared in presence of Fe/HCl from :
    1. (1)benzene
    2. (2)nitrobenzene
    3. (3)dinitrobenzene
    4. (4)none of these
  10. 280.
    Formation of alcohol by oxymercuration demercuration of alkenes :
    1. (1)Involves carbocations and rearrangement
    2. (2)Involves carbanions and rearrangement
    3. (3)Is stereospecific
    4. (4)Does not involve rearrangement and carbocation
  11. 281.
    Identify product and product :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 282.
    The correct structure of 2,6-Dimethyl-dec-4-ene.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 283.
    Compound formed in the following reaction reacts with gives the product . Find out and .
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 284.
    2– Hexyne gives trans –2–Hexene on treatment with :
    1. (1)Pt/H2
    2. (2)Li / NH3
    3. (3)Pd/BaSO4
    4. (4)Li AlH4
  15. 285.
    An aromatic compound ‘A’ having molecular formula on treating with aqueous ammonia and heating forms compounds ‘B’. The compound B on reaction with molecular bromine and potassium hydroxide provides compound ‘C’ having molecular formula N. The structure of ‘A’ is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 286.
    The major product in the following sequence of reactions is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  17. 287.
    In the above chemical reaction sequence " " and " " respectively are
    1. (1)H2O,H+and
    2. (2) and
    3. (3) and
    4. (4)H2O,H+and
  18. 288.
    The major product formed in the following reaction is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 289.
    The final product , formed in the following reaction sequence is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 290.
    The major products and in the following reactions, respectively, are


    1. (1)Alkene (cis)
      Alkene (cis)
    2. (2)Alkane
      Alkene (trans)
    3. (3)Alkene (cis)
      Alkene (trans)
    4. (4)Alkene (trans)
      Alkene (trans)
  21. 291.
    Number of possible alkynes with formula is
    1. (1)3
    2. (2)5
    3. (3)2
    4. (4)4
  22. 292.
    Phenol reacts with methyl chloroformate in the presence of NaOH to form product A. A react with to form product B. A and B are respectively:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 293.
    Choose the correct option for the following reactions.
    1. (1)'A' and 'B' are both Markovnikov addition products.
    2. (2)'A' is Markovnikov product and ET is anti-Markovnikov product.
    3. (3)'A' and 'B' are both anti-Markovnikov products.
    4. (4)'B' is Markovnikov and 'A' is anti-Markovnikov product.
  24. 294.
    The major product in the following reactions is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 295.
    Consider the following reaction:

    The product Y formed is:
    1. (1)5-methylhex-2-yne
    2. (2)Isopropylbut-1-yne
    3. (3)2-methylhex-3-yne
    4. (4)2-methylhex-2-yne
  26. 296.
    In Friedel-Crafts alkylation of aniline, one gets :
    1. (1)alkylated product with ortho and para substitution.
    2. (2)secondary amine after acidic treatment.
    3. (3)an amide product.
    4. (4)positively charged nitrogen at benzene ring.
  27. 297.
    An organic compound A upon reacting with gives B. On heating B gives C. C in presence of KOH reacts with to given . A is :
    1. (1)COOH
    2. (2)COOH
    3. (3)
    4. (4)COOH
  28. 298.
    An alkene on ozonlysis gave acetaldehyde and ethyl methyl ketone. What is the product formed when reacts with ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  29. 299.
    The product(s) of the following reaction sequence is(are)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  30. 300.
    Identify and in the following reaction sequence
    1. (1)
    2. (2)
    3. (3)
    4. (4)