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Alcohols, Phenols and Ethers Test - 8

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Alcohols, Phenols and Ethers Test - 8
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Weekly Quiz Competition
  • Question 1
    4 / -1

     

    Identify the final major product of the reaction sequence.

     

    Solution

     

     

     

     

  • Question 2
    4 / -1

    Which is the best reaction for preparation of t-butyl ethyl ether?

    Solution

  • Question 3
    4 / -1

    The major organic product formed in the following reaction is

    Solution


  • Question 4
    4 / -1

    Consider the following chain of reactions :

    The major product formed in the final step is

    Solution


  • Question 5
    4 / -1

    The best set of reagents for the following transformation is 

    Solution

    Aloxy mercuration - demercuration brings about Markownikoff’s addition of alcohols at   without any rearrangement.

  • Question 6
    4 / -1

    The major organic product formed in the following reaction is

    Solution


    Phenolic — OH does not undergo further substituton. 

  • Question 7
    4 / -1

    Inorganic salts are usually insoluble in organic solvents e.g, KMnO4 is insoluble in benzene. However presence of one of the following compound in benzene makes KMnO4 soluble and gives a purple coloured solution. Which is that compound?

    Solution

    It is a crown ether which traps K+ ion and makes KmnO4 soluble.

  • Question 8
    4 / -1

    Consider the following roadmap reaction :


    The most probable structure of X is

    Solution


  • Question 9
    4 / -1

     

    Ethers may be used as solvents because they react only with which of the following reactants?

    Solution

     

    Ethers resist the attack of nucleophiles and bases. However, they are very good solvents in many organic reactions due to their ability to solvate cations by donating the electron pair from oxygen atom. Ethers are generally less reactive and react only with acids.

     

  • Question 10
    4 / -1

     

    Ethers are :

    Solution

     

    Ethers are compounds which are basic in nature. There is no acidic H in the compound while it has a donor O atom.

  • Question 11
    4 / -1

     

    Williamsons synthesis is an example of :

    Solution

     

    The Williamson ether synthesis is an organic reaction used to convert an alcohol and an alkyl halide to an ether using a base such as NaOH. The mechanism begins with the base abstracting the proton from the alcohol to form an alkoxide intermediate. The alkoxide then attacks the alkyl halide in a nucleophilic substi-tution reaction (SN2), which results in the formation of the final ether product and a metal halide by-product.

  • Question 12
    4 / -1

     

    Nitration of anisole gives majorly:

    Solution

     

    When anisole is nitrated with a mixture of conc HNO3 and H2SO4 it gives a mixture of ortho-Nitroanisole and para-Nitroanisole (major) products.

  • Question 13
    4 / -1

     

    Which of the following compounds will react with sodium hydroxide solution in water?

    Solution

     

    Phenol being more acidic than alcohols, dissolves in NaOH

  • Question 14
    4 / -1

    Which is the most appropriate reagent for the following oxidation reaction?

    CH3 —CH = CH — CH2OH → CH3 —CH =CH — COOH

    Solution

     

    It is Jone's reagent which does not affect the olefinic bonds.

  • Question 15
    4 / -1

    Comprehension Type

    Direction (Q. Nos. 15-17) This section contains a paragraph, describing theory, experiments, data, etc. Three questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

    Passage

    An organic compound X has molecular formula C11H16O and it can be resolved into enantiom ers. X does not evolve any gas with Na metal. X when treated with concentrated HBr gives C6H5OH and Y(C5H11Br). Y is chiral and has the same configuration as that of compound X.

    Q. 

    Which reaction gives X as the major product?

    Solution

  • Question 16
    4 / -1

    An organic compound X has molecular formula C11H16O and it can be resolved into enantiom ers. X does not evolve any gas with Na metal. X when treated with concentrated HBr gives C6H5OH and Y(C5H11Br). Y is chiral and has the same configuration as that of compound X.

    Q. 

    If Y is treated with C2H5ONa/C2H5OH then how many different E2 products would be formed?

    Solution

  • Question 17
    4 / -1

    An organic compound X has molecular formula C11H16O and it can be resolved into enantiom ers. X does not evolve any gas with Na metal. X when treated with concentrated HBr gives C6H5OH and Y(C5H11Br). Y is chiral and has the same configuration as that of compound X.

    Q. 

    If X is treated with H2SO4 it undergoes a rearrangem ent to give Z as the major organic product. What is Z?

    Solution


  • Question 18
    4 / -1

     

    Direction (Q. Nos. 18-22) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

    Q. 

    If a mixture of a 1-propanol and 2-butanol is heated with concentrated H2SO4 at 140°C, how many different ethers would be formed?

    Solution


    (I) will be a single isomer while (II) will have three stereoisomers (one pair of enantiomer and a meso form). (II) will have a pair of enantiomer.

     

  • Question 19
    4 / -1

     

    How many lone pairs are present in 12-crown-4?

     

    Solution

     

     

  • Question 20
    4 / -1

     

    When 2-ethyl-3-methyl-1 -pentene is treated with CH3OH in H2SO4, how many different methoxy ethers would be formed in significant amount?

     

    Solution

     


     

  • Question 21
    4 / -1

     

    How many of the following reactions give the cyclic ether as the major organic product?




     

    Solution

     

    Except (ix) and (x), all other gives cyclic ether as




     

  • Question 22
    4 / -1

     

    How many ether isomers exist for C5H12O?

     

    Solution


     

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