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JEE Main Chemistry · General Organic Chemistry · Set 12 (Q331-360)

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  1. 331.
    The correct increasing order of basic strength for the following compounds is :
    1. (1)II < III < I
    2. (2)III < I < II
    3. (3)III < II < I
    4. (4)II < I <III
  2. 332.
    The incorrect statements regarding geometrical isomerism are : (A) Propene shows
    geometrical isomerism. (B) Trans isomer has identical atoms/groups on the opposite sides of the double bond. (C) Cis-but-2-ene has higher dipole moment than trans-but-2-ene. (D) 2-methylbut-2-ene shows two geometrical isomers. (E) Trans-isomer has lower melting point than cis isomer. Choose the correct answer from the options given below :
    1. (1)(A) and (E) Only
    2. (2)(A), (D) and (E) Only
    3. (3)(B) and (C) Only
    4. (4)(C), (D) and (E) Only
  3. 333.
    The descending order of acidity for the following carboxylic acid is-
    (A)
    (B)
    (C)
    (D)
    (E)
    Choose the correct answer from the options given below:
    1. (1)B>C>D>E>A
    2. (2)E>D>B>A>C
    3. (3)B>D>C>E>A
    4. (4)D>B>A>E>C
  4. 334.
    Inductive effect involves
    1. (1)displacement of -electrons
    2. (2)delocalisation of -electrons
    3. (3)delocalisation of -electrons
    4. (4)displacement of -electrons.
  5. 335.
    Given below are two statements:
    Statement I: is more stable than as nine hyperconjugation interactions are possible in .
    Statement II: is less stable than as only three hyperconjugation interactions are possible in .
    In the light of the above statements, choose the correct answer from the options given below
    1. (1)Statement I is false but Statement II is true
    2. (2)Statement I is true but Statement II is false
    3. (3)Both Statement I and Statement II are true
    4. (4)Both Statement I and Statement II are false
  6. 336.
    effect is shown by
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 337.
    Find out the statements which are not true.(A) Resonating structures with more number of covalent bonds and lesser charge separation are more stable.(B) In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile.(C) Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.(D) The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.(E) Stability of carbanion increases with the increase in s - character of the carbon carrying the negative charge.
    Choose the correct answer from the options given below:
    1. (1)(B) & (D) only
    2. (2)(A, (C) & (D) only
    3. (3)(B) (D) & (E) only
    4. (4)(A) (D) & (E) only
  8. 338.
    The general formula of a cycloalkane is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 339.
    The correct order of nucleophilicity is
    1. (1) >
    2. (2)
    3. (3)
    4. (4)
  10. 340.
    Match the following:

    Test/Method

    Reagent

    Lucas Test

    aq.

    Dumas method



    Kjeldahl's method



    Hinsberg test

    Conc. and



    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 341.
    Tautomerism is exhibited by
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 342.
    Geometrical isomers differ in
    1. (1)position of functional group
    2. (2)position of atoms
    3. (3)spatial arrangement of atoms
    4. (4)length of carbon chain.
  13. 343.
    Paper chromatography is an example of :
    1. (1)Partition chromatography
    2. (2)Thin layer chromatography
    3. (3)Column chromatography
    4. (4)Adsorption chromatography
  14. 344.
    Acetone and propanal are
    1. (1)functional isomers
    2. (2)position isomers
    3. (3)geometrical isomers
    4. (4)optical isomers.
  15. 345.
    The homologue of ethyne is :
    1. (1)C2H2
    2. (2)C2H6
    3. (3)C3H8
    4. (4)C3H4
  16. 346.
    Which is optically inactive ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)None of these
  17. 347.
    'Adsorption' principle is used for which of the following purification method?
    1. (1)Extraction
    2. (2)Chromatography
    3. (3)Distillation
    4. (4)Sublimation
  18. 348.
    Base strength of

    is in the order of
    1. (1)
    2. (2)
    3. (3)(ii)
    4. (4)(iii)
  19. 349.
    Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?
    1. (1) (Solid)
    2. (2)U.V. Light
    3. (3)Visualisation agent as a component of mobile
    4. (4)Spraying of an appropriate reagent
  20. 350.
    Which among the following has highest boiling point?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  21. 351.
    Isomers of a substance must have the same
    1. (1)structural formula
    2. (2)physical properties
    3. (3)chemical properties
    4. (4)molecular formula.
  22. 352.
    Which of the following statements is not correct for a nucleophile?
    1. (1)Ammonia is a nucleophile.
    2. (2)Nucleophiles attack low density sites.
    3. (3)Nucleophiles are not electron seeking.
    4. (4)Nucleophile is a Lewis acid.
  23. 353.
    Which one of the following is most reactive towards electrophilic reagent?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 354.
    Which of the following has the lowest dipole moment?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 355.
    The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is
    1. (1)NaFe[Fe]
    2. (2)Na[Cr]
    3. (3)[Fe(NO)]
    4. (4)[Fe(NOS)]
  26. 356.
    Which one of the carbanions is the least stable?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  27. 357.
    Order of increasing acidic strength
    1. (1)I > II > III
    2. (2)II > III > I
    3. (3)I > III > II
    4. (4)III > II > I
  28. 358.
    Sodium fusion extract of an organic compound with and chlorine water gives violet color to the layer. 0.15 g of gave 0.12 g of the silver halide precipitate in Carius method. Percentage of halogen in the compound is (Nearest integer)
    (Given : molar mass )
  29. 359.
    0.53 g of an organic compound when heated with excess of nitric acid (concentrated) and then with silver nitrate gave 0.75 g of silver bromide precipitate. 1.0 g of gave 1.32 g of gas on combustion. The percentage of hydrogen in the compound (x) is %. [Nearest Integer]
    [Given: Molar mass in Compound ]
  30. 360.
    Total number of possible stereoisomers of dimethyl cyclopentane is___________