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JEE Main Chemistry · Alcohols, Phenols & Ethers · Set 5 (Q121-150)

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  1. 121.
    Assertion (A) : pKa of phenol is 4.19 and that of benzoic acid is 10Reason (R) : Phenoxide ion is stabilised by nonequivalent resonance structures whereas benzoate ion by two equivalent resonance structuresThe correct option among the following is
    1. (1) and are true. is the correct explanation of
    2. (2) and are true, but is not the correct explanation for
    3. (3) is true is false
    4. (4) is false but is true
  2. 122.
    Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
    1. (1)two ethylenic double bonds
    2. (2)a vinyl group
    3. (3)an isopropyl group
    4. (4)an acetylenic triple bond
  3. 123.
    The correct structure of the product A formed in the reaction:

    is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 124.
    Identify simple ether from the following.
    1. (1)Methoxymethane
    2. (2)Methoxyethane
    3. (3)1-propoxybenzene
    4. (4)Anisole
  5. 125.
    Compound , is found to react with NaOI (produced by reacting with NaOH)
    and yields a yellow precipitate with characteristic smell. and are respectively. [NEET 2018]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 126.
    Suitable reaction condition for preparation of Methyl phenyl ether is
    1. (1)
    2. (2)Benzene, MeBr
    3. (3)Ph – Br,
    4. (4), MeBr
  7. 127.
    Product [X] formed in the above reaction is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 128.
    The carbonyl compound that does not undergo aldol condensation is
    1. (1)dichloroacetaldehyde
    2. (2)trichloroacetaldehyde
    3. (3)acetaldehyde
    4. (4)acetone.
  9. 129.
    What is the product obtained in Reimer-Tiemann reaction?
    1. (1)Salicylaldehyde
    2. (2)2, 4, 6-trinitrophenol
    3. (3)Salicylic acid
    4. (4)Aniline
  10. 130.
    Identify the major product of the following reaction.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 131.
    Given are cyclohexanol (I), acetic acid (II), 2,4,6‐trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 132.
    The bond angle of bond in methoxy methane is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 133.
    Reaction of which among the following ethers with in cold leads to the formation of methyl alcohol?
    1. (1)Ethyl methyl ether
    2. (2)Methyl propyl ether
    3. (3)Isopropyl methyl ether
    4. (4)tert-Butyl methyl ether
  14. 134.
    The given reaction can occur in the presence of :
    (A) Bromine water (B) in
    (C) (D) in

    Choose the correct answer from the options given below:
    1. (1)(B) and (D) only
    2. (2)(A) and (C) only
    3. (3)(B), (C) and (D) only
    4. (4)(A), (B) and (D) only
  15. 135.
    Which of the following gives an aldehyde on dry distillation?
    1. (1)Calcium formate + calcium acetate
    2. (2)Calcium acetate + calcium benzoate
    3. (3)Calcium acetate
    4. (4)Calcium benzoate
  16. 136.
    The order of reactivity of the following compounds towards the esterification with acetic acid is
    1. (1)I II III IV
    2. (2)IV III II I
    3. (3)I IV II III
    4. (4)I IV III II
  17. 137.
    Among the following the appropriate reactants for the preparation of 1 - ethyl cyclohexanol are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 138.
    Identify the products and reaction mechanism of the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 139.
    Which of the following compounds will provide a tertiary alcohol on reaction with excess of followed by hydrolysis?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 140.
    Phenol can be distinguished from ethanol by the reagent
    1. (1)bromine water
    2. (2)sodium metal
    3. (3)iron metal
    4. (4)chlorine water.
  21. 141.
    Which of the following is a secondary allylic alcohol?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  22. 142.
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
    Assertion (A): Treatment of bromine water with propene yields 1- bromopropan -2-ol.
    Reason (R): Attack of water on bromonium ion follows Markovnikov rule and results in 1- bromopropan -2-ol.
    choose the answer from the options given below :
    1. (1)Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
    2. (2)(A) is false but (R) is true.
    3. (3)Both (A) and (R) are true and (R) is the correct explanation of (A).
    4. (4)(A) is true but (R) is false.
  23. 143.
    Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called
    1. (1)Fittig reaction
    2. (2)Etard reaction
    3. (3)Wurtz reaction
    4. (4)Williamson reaction.
  24. 144.
    The products formed during the following reaction are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 145.
    The acid strength of active methylene group in
    (i)
    (ii)
    (iii) decreases as
    1. (1)i iii ii
    2. (2)i ii iii
    3. (3)ii i iii
    4. (4)iii i ii
  26. 146.
    The compound on treatment with Na gives , and with gives . and react together to give diethyl ether. and are in the order [NEET 2018]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  27. 147.
    The correct order of boiling points of following compounds is
    1. (1)I II III
    2. (2)II I III
    3. (3)III II I
    4. (4)II III I
  28. 148.
    The reagents and respectively are
    1. (1)
    2. (2), alk.
    3. (3)
    4. (4), alk.
  29. 149.
    The major products and formed in the following reactions respectively are [NEET
    2019]
    1. (1) and
    2. (2) and
    3. (3) and
    4. (4) and
  30. 150.
    Consider the given chemical reaction sequence

    Total sum of oxygen atoms in Product A and Product B are______