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NEET Chemistry · Haloalkanes & Haloarenes · Set 6 (Q151-180)

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  1. 151.
    Identify the incorrect option from the following:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 152.
    Alkyl halide is converted into alkyl isocyanide by reaction with
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 153.
    The chirality of the compound
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 154.
    The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;
    1. (1)Retention occurs in reaction and inversion occurs in reaction.
    2. (2)Racemisation occurs in reaction and retention occurs in reaction.
    3. (3)Racemisation occurs in both and reactions.
    4. (4)Racemisation occurs in reaction and inversion occurs in reaction.
  5. 155.
    Which of the following is a structural formula of DDT?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 156.
    Identify the reagent in the following conversion: Alkyl halide Alkyl nitrite
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 157.
    The major product in the reaction
    1. (1)t-Butyl ethyl ether
    2. (2)2,2-Dimethyl butane
    3. (3)2-Methylpent-l-ene
    4. (4)2-Methylprop-l-ene
  8. 158.
    Finkelstein reaction is used for the synthesis of
    1. (1)RF
    2. (2)RI
    3. (3)RCl
    4. (4)RBr
  9. 159.
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
    Assertion (A): SN2 reaction of occurs more readily than the SN2 reaction of .
    Reason (R) : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.
    In the light of the above statements, choose the most appropriate answer from the options given below :
    1. (1) is correct but (R) is not correct
    2. (2) is not correct but (R) is correct
    3. (3)Both (A) and (R) are correct but (R) is not the correct explanation of (A)
    4. (4)Both (A) and (R) are correct and (R) is the correct explanation of
  10. 160.
    Which one of the following chlorohydrocarbon readily undergoes solvolysis?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 161.
    In the reaction

    The number of possible isomers for the organic compound is
    1. (1)5
    2. (2)3
    3. (3)2
    4. (4)4
  12. 162.
    Reaction of ‐butyl bromide with sodiummethoxide produces
    1. (1)sodium ‐butoxide
    2. (2)‐butyl methyl ether
    3. (3)isobutane
    4. (4)isobutylene.
  13. 163.
    The number of optical isomers possible for 2-bromo-3chloro butane are
    1. (1)8
    2. (2)10
    3. (3)4
    4. (4)2
  14. 164.
    The correct structure of product 'A' formed in the following reaction.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 165.
    When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major
    product is:
    1. (1)1-bromo-1-(butan-2-yl)cyclohexane
    2. (2)1-bromo-2-(butan-2-yl)cyclohexane
    3. (3)2-bromo-2-cyclohexylbutane
    4. (4)2-bromo-3-cyclohexylbutane
  16. 166.
    Which of the following is the geminal dichloride?
    1. (1)1,1-Dichloropropane
    2. (2)1,2-Dichloropropane
    3. (3)1,3-Dichloropropane
    4. (4)2,3-Dichloropropane
  17. 167.
    The major product of the following reaction is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 168.
    The correct order of reactivity of the given chlorides with acetate in acetic acid is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 169.
    The above reaction requires which of the following reaction conditions?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 170.
    The maximum number of RBr producing 2-methylbutane by above sequence of reactions is -(Consider the structural isomers only)
    1. (1)5
    2. (2)4
    3. (3)3
    4. (4)1
  21. 171.
    Arenes on treatment with chlorine in presence of ferric chloride as a catalyst undergo what type of reaction?
    1. (1)Electrophilic substitution
    2. (2)Nucleophilic substitution
    3. (3)Electrophilic addition
    4. (4)Nucleophilic addition
  22. 172.
    Industrial preparation of chloroform employs acetone and
    1. (1)phosgene
    2. (2)calcium hypochlorite
    3. (3)chlorine gas
    4. (4)sodium chloride.
  23. 173.
    The major product of the following reaction is Product
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 174.
    An incorrect statement with respect to and mechanisms for alkyl halide is
    1. (1)a strong nucleophile in an aprotic solvent increases the rate or favours reaction
    2. (2)competing reaction for an reaction is rearrangement
    3. (3) reactions can be catalysed by some Lewis acids
    4. (4)a weak nucleophile and a protic solvent increases the rate or favours reaction.
  25. 175.
    Cycloalkane formed when 1,4-dibromopentane is heated with sodium is
    1. (1)methyl cyclobutane
    2. (2)cyclopentane
    3. (3)cyclobutane
    4. (4)methyl cyclopentane.
  26. 176.
    In assigning -configuration which among the following groups has highest priority?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  27. 177.
    The compound having longest bond is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  28. 178.
    Which of the following reactions is an example of nucleophilic substitution reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  29. 179.
    Tertiary alkyl halide is practically inert to substitution by mechanism because of
    1. (1)insolubility
    2. (2)instability
    3. (3)inductive effect
    4. (4)steric hindrance.
  30. 180.
    The hydrolysis of optically active 2-bromobutane with aqueous results in the formation of
    1. (1)(-)-butan-2-ol
    2. (2)( )-butan-2-ol
    3. (3)(+)-butan-2-ol
    4. (4)(土)-butan-1-ol