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Set 15 of 25 · Questions 421-450 of 724

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JEE Main Chemistry · General Organic Chemistry · Set 15 (Q421-450)

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  1. 421.
    Correct structure of -methylcyclohexane carbaldehyde is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 422.
    Among the given species the Resonance stabilised carbocations are:
    1. (1)(C) and (D) only
    2. (2)(A), (B) and (D) only
    3. (3)(A) and (B) only
    4. (4)C only
  3. 423.
    The IUPAC name of the following compound is
    1. (1)2-hydroxy-5-oxoethylcyclohexane
    2. (2)2-ethyl-4-oxocyclohexanol
    3. (3)3-ethyl-4-hydroxycyclohexanone
    4. (4)6-hydroxy-3-oxoethylcyclohexane
  4. 424.
    The "N" which does not contribute to the basicity for the compound is :
    1. (1)N 7
    2. (2)N 1
    3. (3)N 9
    4. (4)N 3
  5. 425.
    Name of some compounds are given. Which one is not in IUPAC system ?
    1. (1)3–Methyl–4–ethyl heptane
    2. (2)3–Methyl–2–butanol
    3. (3)2–Ethyl–3–methyl–but–1–ene
    4. (4)4–Methyl–2–pentyne
  6. 426.
    The general molecular formula, which represents the homologous series of
    alkanols is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 427.
    Which one of the following compounds possesses the most acidic hydrogen?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 428.
    The correct nomenclature for the following compound is :
    1. (1)2-formyl-4-hydroxyhept-7-enoic acid
    2. (2)2-formyl-4-hydroxyhept-6-enoic acid
    3. (3)2-carboxy-4-hydroxyhept-7-enal
    4. (4)2-carboxy-4-hydroxyhept-6-enal
  9. 429.
    Which one among the following resonating structures is not correct?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 430.
    The correct IUPAC name of the following compound is:
    1. (1)6-bromo-4-méthyl-2-chlorohexan-4-ol
    2. (2)1-bromo-5-chloro-4-methylhexan-3-ol
    3. (3)6-bromo-2-chloro-4-methylhexan-4-ol
    4. (4)1-bromo-4-methyl-5-chlorohexan-3-ol
  11. 431.
    Compound that will give positive Lassaigne's test for both nitrogen and halogen is
    1. (1).HCl
    2. (2). HCl
    3. (3)Cl
    4. (4)OH.HCl
  12. 432.
    Which of the following reactions will not produce a racemic product?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 433.
    The name for the following compound is
    1. (1) acid
    2. (2)2,5 -dimethyl-6-carboxy-hexenal
    3. (3)2,5- dimethyl carboxy-hex enal
    4. (4)2, 5-dimethyl-6-oxo-hexenoic acid
  14. 434.
    Acetyl bromide reacts with excess of MgI followed by treatment with a saturated solution of Cl gives
    1. (1)Acetone
    2. (2)Acetamide
    3. (3)2-Methyl-2-propanol
    4. (4)Acetyl iodide
  15. 435.
    The shortest C-C bond distance is found in
    1. (1)diamond
    2. (2)ethane
    3. (3)benzene
    4. (4)acetylene.
  16. 436.
    The IUPAC name for tertiary butyl iodide is -
    1. (1)4-iodobutane
    2. (2)2-iodobutane
    3. (3)1-iodo-3-methyl propane
    4. (4)2-iodo-2-methyl propane
  17. 437.
    The functional group that shows negative resonance effect is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 438.
    The set of meta directing functional groups from the following sets is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 439.
    Among the following marked proton of which compound shows lowest value ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 440.
    Following reaction (CH3)3CBr + H2O (CH3)3COH + HBr
    is an example of :
    1. (1)Elimination reaction
    2. (2)Free radical substitution
    3. (3)Nucleophilic substitution
    4. (4)Electrophilic substitution
  21. 441.
    The number of stereoisomers possible for a compound of the molecular formula –CH=CH–CH(OH)–Me is:
    1. (1)2
    2. (2)4
    3. (3)6
    4. (4)3
  22. 442.
    The synthesis of alkyl fluorides is best accomplished by :
    1. (1)Free radical fluorination
    2. (2)Sandmeyer's reaction
    3. (3)Finkelstein reaction
    4. (4)Swarts reaction
  23. 443.
    3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :
    1. (1)Zero
    2. (2)Two
    3. (3)Four
    4. (4)Six
  24. 444.
    The number of -bonds and -bonds present in naphthalene are respectively
    1. (1)6,19
    2. (2)5,19
    3. (3)5,11
    4. (4)5,20
  25. 445.
    The name of the following compound is :
    1. (1) -Dimethyl -hydroxybutanoic acid
    2. (2)2-Methyl-hydroxypentan-5-oic acid
    3. (3)-Hydroxy--methylpentanoic acid
    4. (4)4-Methyl-hydroxypentanoic acid
  26. 446.
    The name for the following compound is:
    1. (1)-methyl--(-methylprop-l-enyl)-I-heptyne
    2. (2) -dimethyl--propylhept--en-l-yne
    3. (3)-methyl--(-methylprop--ynyl)-l-heptene
    4. (4)-dimethyl--propylhept--en--yne
  27. 447.
    The correct IUPAC name of the following compound is :
    1. (1)4-methyl-2-nitro-5-oxohept-3-enal
    2. (2)4-methyl-5-oxo-2-nitrohept-3-enal
    3. (3)4-methyl-6-nitro-3-oxohept-4-enal
    4. (4)6-formyl-4-methyl-2-nitrohex-3-enal
  28. 448.
    What is the name of the following compound?
    1. (1)-Bromo--dimethylbut--ene
    2. (2)-Bromo--methyl--dimethylprop--ene
    3. (3)-Bromo--methylpent--ene
    4. (4)-Bromo--methylpent--ene
  29. 449.
    In which of the following compounds, the C—CI bond ionisation shall give most stable carbonium ion?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  30. 450.
    Observe structures of the following compounds

    The total number of structures/compounds which possess asymmetric carbon atoms is__________.