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Halogen Containing Organic Compounds Flashcards

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1
Q
  1. Which C-X bond has the highest bond energy per mole?
    a) C-Br
    b) C-Cl
    c) C-F
    d) C-I
A

c) C-F

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2
Q
  1. Which alkyl halide has the highest reactivity for a
    particular alkyl group?
    a) R-F
    b) R-Cl
    c) R-I
    d) R-Br
A

c) R-I

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3
Q
  1. When ethyl chloride reacts with nascent hydrogen, what
    is the formed product?
    a) Methane
    b) Propane
    c) Butane
    d) Ethane
A

d) Ethane

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4
Q
  1. Which of the following halide can give best SN2
    reaction?
    a) Primary alkyl halide
    b) Tertiary alkyl halide
    c) Secondary alkyl halide
    d) All can give SN2 reaction at same rate
A

a) Primary alkyl halide

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4
Q
  1. Which alkyl halide out of the following may follow both
    SN1 and SN2 mechanism?
    a) CH3-X
    b) (CH3)2CH-X
    c) (CH3)3C-X
    d) (CH3)3C-CH2-X
A

b) (CH3)2CH-X

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5
Q
  1. When two moles of ethyl chloride react with two moles
    of sodium in the presence of ether what will be formed?
    a) 2 moles of ethane
    b) 1 moles of ethane
    c) 2 moles of butane
    d) 1 moles of butane
A

d) 1 moles of butane

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6
Q
  1. The molecular formula of DDT has how many chlorine
    atoms?
    a) 5 chlorine atoms
    b) 2 chlorine atoms
    c) 3 chlorine atoms
    d) 4 chlorine atoms
A

a) 5 chlorine atoms

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6
Q
  1. In primary alkyl halides, carbon attached to the halogen
    atom is further attached to how many carbon atoms?
    a) 1
    b) 2
    c) 3
    d) 4
A

a) 1

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6
Q
  1. Which of the following is not the method of preparation
    of alkyl halide?
    a) Darzen’s method
    b) Halogenation of alkene
    c) Addition of HX on alkenes
    d) Hydration of alkene
A

d) Hydration of alkene

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7
Q
  1. Why alkyl halides are considered to be very reactive
    compounds towards nucleophile?
    a) they have an electrophilic carbon & a bad leaving group
    b) they have a nucleophilic carbon & a good leaving group
    c) they have an electrophilic carbon
    d) they have an electrophilic carbon & a good leaving
    group
A

d) they have an electrophilic carbon & a good leaving
group

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8
Q
  1. Which of the following is the commercial method of
    preparation of Chlorobenzene?
    a) Raschig process
    b) Wurtz Fitting reaction
    c) Friedel-Crafts reaction
    d) Grignard reaction
A

a) Raschig process

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8
Q
  1. Which of the following reactant gives the best method
    of preparation of alkyl halides when reacts with alcohol?
    a) Zn/HCl
    b) PCl5
    c) SOCl2/ Pyridine
    d) PCl3
A

c) SOCl2/ Pyridine

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9
Q
  1. Which of the following is true about chlorobenzene?
    a) Chlorobenzene is less reactive than benzyl chloride
    b) Chlorobenzene is more reactive than ethyl bromide
    c) Chlorobenzene is nearly as reactive as methyl chloride
    d) Chlorobenzene is more reactive than isopropyl chloride
A

a) Chlorobenzene is less reactive than benzyl chloride

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10
Q
  1. What will be the product for the given reaction?
    a) CCl3CHO
    b) C6H6Cl6
    c) C6H12Cl6
    d) C6H9Cl2
A

b) C6H6Cl6

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10
Q
  1. Benzene reacts with chlorine to form benzene
    hexachloride in presence of which of the following
    reactant?
    a) Nickel
    b) AlCl3
    c) Bright sunlight
    d) Zinc
A

c) Bright sunlight

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11
Q
  1. What is the IUPAC name of chloroform?
    a) Dichloromethane
    b) Trichloromethane
    c) Chloromethane
    d) Carbon tetrachloride
A

b) Trichloromethane

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12
Q
  1. Which among the following is true?
    a) Freon does not initiate radical chain reactions in
    stratosphere
    b) Iodoform initiates radical chain reactions in
    stratosphere
    c) Freon initiates radical chain reactions in stratosphere
    d) Chloroform initiates radical chain reactions in
    stratosphere
A

c) Freon initiates radical chain reactions in stratosphere

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12
Q
  1. Central nervous system can be depressed by the use of
    which of the following:
    a) Chloroform
    b) Freon
    c) Iodoform
    d) DDT
A

a) Chloroform

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13
Q
  1. CFxCly [where x + y = 4], why these compounds are not
    used?
    a) These are fluoro carbons
    b) These are difficult to synthesise
    c) They deplete ozone layer
    d) These are very expensive
A

c) They deplete ozone layer

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13
Q
  1. Which one of the following is the correct formula of
    methylene dichloride?
    a) ClCH = CHCl
    b) ClC ≡ CCl
    c) CH2Cl2
    d) CH2(Cl) CH2Cl
A

c) CH2Cl2

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14
Q
  1. How Benzene hexachloride (BHC) is used?
    a) Insecticides
    b) Fertilizers
    c) Anaesthetics
    d) Antiseptics
A

a) Insecticides

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15
Q
  1. Which is the correct formula of Freon-12?
    a) CCl2F2
    b) CClF3
    c) CHCl2F
    d) CCl3F
A

a) CCl2F2

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16
Q
  1. Depletion of Ozone is believed to increase which of the
    following?
    a) Population
    b) Ultraviolet rays
    c) Pollution
    d) Greenery
A

b) Ultraviolet rays

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17
Q
  1. Which of the following compounds does not give a
    tertiary alcohol upon reaction with methylmagnesium
    bromide?
    a) 3-methylpentanal
    b) Ethyl benzoate
    c) 4,4-dimethylcyclohexanone
    d) 4-heptanone
A

d) 4-heptanone

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17
Q
  1. Which is not present in Grignard reagent?
    a) Methyl group
    b) Magnesium
    c) Halogen
    d) −COOH group
A

d) −COOH group

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17
Q
  1. Alkyl halides can be converted into Grignard reagents by
    a) Boiling them with Mg ribbon in alcoholic solution
    b) Warming them with magnesium powder in dry ether
    c) Refluxing them with MgCl2 solution
    d) Warming them with Mgcl2
A

b) Warming them with magnesium powder in dry ether

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18
Q
  1. A Grignard’s reagent may be made by reacting
    magnesium with which of the following compound?
    a) Methyl amine
    b) Diethyl ether
    c) Ethyl iodide
    d) Ethyl alcohol
A

c) Ethyl iodide

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18
Q
  1. Which of the following statements about Grignard
    reagent is false?
    a) Grignard reagents (RMgBr) add to the carbonyl group of
    aldehydes and ketones
    b) An organosodium compound is not very reactive
    compared to a Grignard reagent
    c) Grignard reagents are prepared in ether or
    tetrahydrofuran (THF)
    d) Grignard reagents are decomposed by water and
    alcohol
A

b) An organosodium compound is not very reactive
compared to a Grignard reagent

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18
Q
  1. Which of the following compounds gives a secondary
    alcohol upon reaction with methylmagnesium bromide?
    a) Butyl formate
    b) 3- pentanone
    c) Pentanal
    d) Methyl butanoate
A

c) Pentanal

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19
Q
  1. Which of the following compounds would not give tert
    butyl alcohol when treated with excess methylmagnesium
    bromide?
    a) acetyl chloride
    b) acetaldehyde
    c) methyl acetate
    d) acetic anhydride
A

b) acetaldehyde

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19
Q
  1. Which of the following reagents, when treated with
    phenylmagnesiuim bromide followed by acid workup, will
    yield 2-phenylethanol?
    a) Ethanol
    b) Diethyl ether
    c) Ethanal
    d) Oxirane
A

d) Oxirane

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19
Q
  1. Which of the following compounds gives a primary
    alcohol upon reaction with phenylmagnesium bromide?
    a) 2-methyloxirane
    b) ethylene oxide
    c) ethyl formate
    d) carbon dioxide
A

b) ethylene oxide

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20
Q
  1. Which of the following vinyl halide has industrial
    application?
    a) Vinyl fluoride
    b) Vinyl chloride
    c) Vinyl bromide
    d) Vinyl iodide
A

b) Vinyl chloride

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20
Q
  1. Which of the following statement is incorrect about
    allylic halide?
    a) The positions adjacent to alkene C=C often show
    decrement in reactivity
    b) SN1 reactions of allylic halides are possible
    c) Allylic bonds are often weaker and therefore more easily
    broken
    d) stability of the allylic radical can be utilized in the
    preparation of allylic halides
A

c) Allylic bonds are often weaker and therefore more easily
broken

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20
Q
  1. Which of the following allylic halide has commercial
    usage?
    a) H2C = CH−CH2Cl
    b) H2C = CH−CH2Br
    c) H2C = CH−CH2I
    d) H2C = CH−CH2F
A

a) H2C = CH−CH2Cl

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21
Q
  1. How can be a vinylic halide converted into Grignard
    reagent?
    a) Addition of base
    b) Addition of acid
    c) By adding magnesium
    d) Addition of diethyl ether
A

c) By adding magnesium

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22
Q
  1. What will be the product when addition of hydrogen
    chloride to vinyl chloride occurs?
    a) 1,1-dichloroethane
    b) 1,2-dichloroethane
    c) 1-chloroethane
    d) 1-chloro 2,2-dichloroethane
A

a) 1,1-dichloroethane

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23
Q
  1. Catalytic reduction (Hydrogenation) of carbon
    monooxide with H2 under high pressure and temperature
    gives methyl alcohol. What is this process is known as?
    a) Baeyer’s test
    b) Hofmann’s reaction
    c) Kolb process
    d) BASF process
A

d) BASF process

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23
Q
  1. Acid catalysed hydration of alkenes except ethene leads
    to the formation of which of the following?
    a) Mixture of secondary and tertiary alcohols
    b) Mixture of secondary and tertiary alcohols
    c) Secondary or tertiary alcohol
    d) Primary alcohol
A

a) Mixture of secondary and tertiary alcohols

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23
Q
  1. What will be the product for the given reaction?
    CH2 = CHC ≡ CH + HCl → ?
    vinylacetylene
    a) 2-chloro-1,3-dibutadiene
    b) 1,2-dichloro-1,3-dibutadiene
    c) 1-chloro-2,3-dibutadiene
    d) 3-chloro-1,2-dibutadiene
A

a) 2-chloro-1,3-dibutadiene

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24
Q
  1. Which of the following statements is incorrect regarding
    preparation of alcohols?
    a) Aldehydes and Ketones on catalytic reduction by [H]
    give primary alcohol and secondary alcohol respectively
    b) Ketones on reaction with Grignard’s reagent gives
    tertiary alcohol
    c) Aldehydes on reaction with Grignard’s reagent gives
    primary or secondary alcohol
    d) Alkyl halides on reaction alcoholic potash gives alcohol
A

d) Alkyl halides on reaction alcoholic potash gives alcohol

25
Q
  1. Which of the following steps is not used in the
    fermentation of starch into ethyl alcohol?
    a) Hydrolysis of starch into maltose by diastase present in
    barley
    b) Conversion of maltose into glucose by maltase present
    in yeast
    c) Conversion of glucose into ethanol by zymase present in
    yeast
    d) Conversion of sucrose into glucose and fructose by
    sucrase present in yeast
A

d) Conversion of sucrose into glucose and fructose by
sucrase present in yeast

26
Q
  1. Which of the following way is not a method of
    preparation of alcohol?
    a) Grignard reaction
    b) Reduction of an aldehyde, ketone, or carboxylic acid
    with the appropriate reducing agent
    c) Substitution reaction of hydroxide or water on the
    appropriate alkyl halide
    d) Haber’s process
A

d) Haber’s process

26
Q
  1. 15% pure ethyl alcohol (wash) on fractional distillation
    gives 95% ethyl alcohol by weight which is commonly
    known as which of the following terms?
    a) Wash
    b) Absolute alcohol
    c) Rectified spirit
    d) Methylated spirit
A

c) Rectified spirit

26
Q
  1. Ethyl alcohol obtained by fermentation of starch or
    molasses is called wash, and what is it’s purity?
    a) 15%
    b) 99%
    c) 99.9%
    d) 95%
A

a) 15%

27
Q
  1. Which is the only alcohol that can be prepared by the
    indirect hydration of alkene?
    a) Ethyl alcohol
    b) Propyl alcohol
    Answer: d
    c) Isobutyl alcohol
    d) Methyl alcohol
A

a) Ethyl alcohol

28
Q
  1. Which one of the following compound is obtained by
    the oxidation of primary alcohol with nascent oxygen?
    a) Alkanal
    b) Alkanone
    c) Ether
    d) Amine
A

a) Alkanal

28
Q
  1. Among the alkenes which one produces tertiary butyl
    alcohol on acid hydration?
    a) (CH3)2C=CH2
    b) CH3-CH=CH-CH3
    c) CH3CH2CH=CH2
    d) CH3CH=CH2
A

a) (CH3)2C=CH2

29
Q
  1. Isopropyl methyl ether when treated with cold
    hydrogen iodide gives which of the following alcohol?
    a) isopropyl iodide and methyl iodide
    b) isopropyl alcohol and methyl iodide
    c) isopropyl alcohol and methyl alcohol
    d) isopropyl iodide and methyl alcohol
A

b) isopropyl alcohol and methyl iodide

30
Q
  1. Secondary alcohols on catalytic dehydrogenation by Cu
    Ni couple gives ___________
    a) Ketone
    b) Aldehyde
    c) Carboxylic acid
    d) Amine
A

a) Ketone

30
Q
  1. Which one of the following compound is obtained by
    the oxidation of secondary alcohols by [O]?
    a) Ketone
    b) Aldehyde
    c) Ether
    d) Amine
A

a) Ketone

31
Q
  1. The reaction of carboxylic acids with alcohols catalysed
    by conc. H2SO4 is called __________
    a) Dehydration
    b) Saponification
    c) Esterification
    d) Neutralization
A

c) Esterification

32
Q
  1. Which one is the correct order of reactivity of different
    types of alcohol towards hydrogen halide?
    a) 1° alcohol > 2° alcohol > 3° alcohol
    b) 2° alcohol > 1° alcohol > 3° alcohol
    c) 3° alcohol > 1° alcohol > 2° alcohol
    d) 3° alcohol > 2° alcohol > 1° alcohol
A

d) 3° alcohol > 2° alcohol > 1° alcohol

32
Q
  1. The dehydration of alcohols is an example of ________
    a) Bimolecular elimination/E2 reaction
    b) SN2 reaction
    c) SN1 reaction
    d) Unimolecular elimination/E1 reaction
A

d) Unimolecular elimination/E1 reaction

33
Q
  1. Among the following, which is least acidic?
    a) Phenol
    b) O-cresol
    c) p-nitrophenol
    d) p- chlorophenol
A

b) O-cresol

34
Q
  1. The major reason that phenol is a better Bronsted acid
    than cyclohexanol is ____________
    a) it is a better proton donor
    b) the cyclohexyl group is an electron donating group by
    induction, which destabilizes the anion formed in the
    reaction
    c) phenol is able to stabilize the anion formed in the
    reaction by resonance
    d) the phenyl group is an electron withdrawing group by
    induction, which stabilizes the anion formed in the
    reaction
A

c) phenol is able to stabilize the anion formed in the
reaction by resonance

34
Q
  1. Which of the following alcohols would be most soluble
    in water?
    a) Propanol
    b) Hexanol
    c) Pentanol
    d) Butanol
A

a) Propanol

35
Q
  1. CH3OH is a which type of acid?
    a) Bronsted acid
    b) Lewis acid
    c) Arrhenius acid
    d) Lewis and Arrhenius acid
A

a) Bronsted acid

35
Q
  1. What is the correct order of acidic strength?
    a) CH3-OH
    b) CH3CH2-OH
    c) CH3 CH2 CH2-OH
    d) CH3 CH2 CH2 CH2-OH
A

a) CH3-OH

36
Q
  1. Which of the following is more acidic alcohol?
    a) Phenol
    b) Cyclohexanol
    c) Methanol
    d) Ethanol
A

a) Phenol

36
Q
  1. Which of the following is more acidic than alcohols?
    a) Arrhenius acid
    b) amine
    c) alkyne
    d) carboxylic acid
A

d) carboxylic acid

37
Q
  1. What is the IUPAC name for vinylic alcohol?
    a) Ethanol
    b) Methanol
    c) Ethenol
    d) Methenol
A

c) Ethenol

38
Q
  1. Which of the following is not an isomer of vinylic
    alcohol?
    a) Acetaldehyde
    b) Ethylene oxide
    c) Ethanol
    d) Ethanal
A

c) Ethanol

39
Q
  1. Which of the statement is not true about vinylic
    alcohols?
    a) Several metal complexes are known that contain vinyl
    alcohol as a ligand
    b) Vinyl alcohol was discovered in the molecular cloud
    Sagittarius B, using the 12-meter radio telescope
    c) It can be formed by elimination of water from ethylene
    glycol at a temperature of 900 °C and low pressure
    d) Vinylic alcohol shows no tautomerism
A

d) Vinylic alcohol shows no tautomerism

40
Q
  1. Polyvinyl alcohol is soluble in which solvent?
    a) protic
    b) aprotic
    c) polar aprotic
    d) polar protic
A

d) polar protic

41
Q
  1. What is the commercial method of preparation of
    phenol?
    a) Dows process
    b) From diazonium salt
    c) By decarboxylation of salicylic acid
    d) Hock method
A

d) Hock method

41
Q
  1. On heating aqueous solution of benzene diazonium
    chloride, which of the following is formed?
    a) benzene
    b) chlorobenzene
    c) phenol
    d) aniline
A

c) phenol

42
Q
  1. Sodium benzene sulphonate reacts with NaOH and then
    on acidic hydrolysis, it gives which of the following
    compound?
    a) Phenol
    b) Benzoic acid
    c) Benzene
    d) Disodium benzaldehyde
A

a) Phenol

43
Q
  1. Reaction of aqueous sodium hydroxide on
    chlorobenzene gives which of the following products?
    a) o-chlorophenol
    b) o-chlorophenol
    c) phenol
    d) no reaction
A

c) phenol

44
Q
  1. What is the reagent which will react with cumene to
    give phenol?
    a) Oxygen
    b) Hydrogen
    c) Nitrogen
    d) Ozone
A

a) Oxygen

45
Q
  1. What is the reactant ‘x’ and ‘y’ that will react with
    benzene to give phenol?
    a) X is Oleum and y is molten sodium hydroxide followed
    by H+
    b) X is Oleum and y is HCl
    c) X is Oleum and y is NH3
    d) X is Oleum and y is water
A

b) X is Oleum and y is HCl

46
Q
  1. Phenolphthalein is obtained by heating phenol with
    conc. H2SO4 and which of the following reactant?
    a) Benzyl alcohol
    b) Benzene
    c) Benzoic acid
    d) Phthalic anhydride
A

d) Phthalic anhydride

47
Q
  1. Which of the following is not a method for preparation
    of phenol?
    a) Dows process
    b) From diazonium salt
    c) By decarboxylation of salicylic acid
    d) By the decarboxylation of sodium benzoate
A

a) Dows process

47
Q
  1. Phenol is obtained by heating aqueous solution of
    which of the following?
    a) Aniline
    b) Benzene diazonium chloride
    c) Benzoic acid
    d) Benzyl alcohol
A

b) Benzene diazonium chloride

48
Q
  1. Salicylaldehyde can be prepared from which of the
    following reactants?
    a) Phenol and chloroform
    b) Phenol, chloroform and sodium hydroxide
    c) Phenol, carbon tetrachloride and NaOH
    d) Phenol, carbon tetrachloride
A

b) Phenol, chloroform and sodium hydroxide

48
Q
  1. When phenol is treated with excess of bromine water, it
    gives which of the following product?
    a) m-bromophenol
    b) o-and p-bromophenol
    c) 2,4-dibromophenol
    d) 2,4,6-tribromophenol
A

d) 2,4,6-tribromophenol

49
Q
  1. Which of the following regents may be used to
    distinguish between phenol and benzoic acid?
    a) Aqueous NaOH
    b) Tollen’s reagent
    c) Molisch reagent
    d) Neutral FeCl3
A

d) Neutral FeCl3

49
Q
  1. Phenol reacts with bromine in carbon disulphate at low
    temperature to give which of the following product?
    a) m-bromophenol
    b) o-and p-bromophenol
    c) p-bromophenol
    d) 2,4,6-tribromophenol
A

b) o-and p-bromophenol

49
Q
  1. Bromine reacts with phenol and decolorize orange color
    and turns it to which of the colored precipitate?
    a) white precipitate
    b) pink precipitate
    c) blue precipitate
    d) black precipitate
A

a) white precipitate

50
Q
  1. Bakelite is formed when phenol react with which of the
    following reactant?
    a) Formaldehyde
    b) Hydrogen
    c) Nitric acid
    d) Sulphuric acid
A

a) Formaldehyde

50
Q
  1. What is the major product obtained on interaction of
    phenol with sodium hydroxide and carbon dioxide?
    a) Benzoic acid
    b) Salicyladehyde
    c) Salicylic acid
    d) Phthalic acid
A

c) Salicylic acid

51
Q
  1. Picric acid is formed when phenol react with which of
    the following reactant?
    a) Formaldehyde
    b) Hydrogen
    c) Nitric acid
    d) Hydrochloric acid
A

c) Nitric acid

52
Q
  1. Chloroethane reacts with X to form diethyl ether. What
    is X?
    a) NaOH
    b) H2SO4
    c) C2H5ONa
    d) Na2S2O3
A

c) C2H5ONa

52
Q
  1. Phenol undergoes ionization to become more stable by
    reacting with which of the following chemical species?
    a) negative ions
    b) positive ions
    c) radicals
    d) neutral atoms
A

a) negative ions

53
Q
  1. In which case would a Williamson ether synthesis fail?
    a) sodium ethoxide + iodomethane
    b) sodium ethoxide + iodoethane
    c) sodium ethoxide + 2-iodopropane
    d) sodium ethoxide + 2-iodo-2-methylpropane
A

d) sodium ethoxide + 2-iodo-2-methylpropane

53
Q
  1. The reaction given below is known as by which o the
    following reaction?
    C2H5ONa+IC2H5→C2H5OC2H5+NaI
    a) Kolbe’s synthesis
    b) Wurtz’s synthesis
    c) Williamson’s synthesis
    d) Grignard’s synthesis
A

c) Williamson’s synthesis

54
Q
  1. The Williamson ether synthesis produces ethers by
    reacting which of the following?
    a) alcohol with a metal
    b) alkoxide with a metal
    c) alkoxide with an alkyl halide
    d) alkyl halide with an aldehyde
A

c) alkoxide with an alkyl halide

55
Q
  1. Which of the following reagents should be used to
    prepare tert-butyl ethyl ether?
    a) tert-butyl bromide and sodium ethoxide
    b) tert-butyl alcohol and ethyl bromide
    c) tert-butyl alcohol and ethanol
    d) potassium tert-butoxide and ethyl bromide
A

d) potassium tert-butoxide and ethyl bromide

56
Q
  1. Which of the following reagents should be used to
    prepare tert-butyl propyl ether?
    a) 2-methylpropene and 1-propanol
    b) 2-methylpropene, acetic acid and 1-propanol
    c) 2-methylpropene, H2SO4 and 1-propanol
    d) 1-propyl bromide and tert-butyl alcohol
A

c) 2-methylpropene, H2SO4 and 1-propanol

57
Q
  1. What will be the reactant and reaction condition
    required for the given reaction?
    CH3CH2OH +? → C2H5OC2H5
    a) H2SO4, 413K
    b) H2SO4, 443K
    c) HNO3, 413K
    d) HNO3, 443K
A

a) H2SO4, 413K

58
Q
  1. Which of the following is the method of preparation of
    ether?
    a) Dows process
    b) Williamson synthesis
    c) By decarboxylation of salicylic acid
    d) Hock method
A

b) Williamson synthesis

59
Q
  1. Williamson synthesis proceed visa which of the
    following mechanism?
    a) SN1
    b) SN2
    c) E1
    d) E2
A

b) SN2

60
Q
  1. An ether is more volatile than an alcohol having the
    same molecular formula. What is the reason for this
    difference?
    a) dipolar character of ethers
    b) alcohols having resonance structures
    c) inter-molecular hydrogen bonding in ethers
    d) inter-molecular hydrogen bonding in alcohols
A

d) inter-molecular hydrogen bonding in alcohols

61
Q
  1. The boiling point of ethyl alcohol is much higher than
    that of dimethyl ether though
    both have the same molecular weight. Why?
    a) Ether is insoluble in water
    b) Methyl groups are attached to oxygen in ether
    c) Dipole moment of ethyl alcohol is less
    d) Ethyl alcohol shows hydrogen bonding
A

d) Ethyl alcohol shows hydrogen bonding

61
Q
  1. Which of the following is the commercial method of
    formation of ether?
    a) Dehydration of alcohol
    b) Williamson ether synthesis
    c) Ullmann condensation
A

b) Williamson ether synthesis

62
Q
  1. Ethers may be used as solvents because they react only
    with which of the following reactants?
    a) Acids
    b) Bases
    c) Oxidising agent
    d) Reducing agents
A

a) Acids

62
Q
  1. Select the ether among following that yields methanol
    as one of the products on reaction with cold hydroiodic
    acid.
    a) 1-Methoxybutane
    b) 1-Methoxy-2-methylpropane
    alcohol. We’ll have more about that to say in a few posts
    c) 2-Methoxy-2-methylpropane
    d) Methoxybenzene
A

c) 2-Methoxy-2-methylpropane

63
Q
  1. What are the products when ethyl isopropyl ether is
    cleaved with concentrated HI?
    a) ethanol and 2-iodo-2-methylpropane
    b) ethanol and 2-methylpropane
    c) iodoethane and isopropyl alcohol
A

c) iodoethane and isopropyl alcohol

64
Q
  1. What are the products when tert-butyl ethyl ether is
    cleaved with concentrated HI?
    a) iodoethane and tert-butanol
    b) iodoethane and 2-iodo-2-methylpropane
    c) ethanol and 2-iodo-2-methylpropane
    d) ethanol and tert-butanol
A

c) ethanol and 2-iodo-2-methylpropane

65
Q
  1. Which pair of products would result from the acid
    cleavage of phenyl propyl ether with excess concentrated
    HBr at an elevated temperature?
    a) Phenol and 1-propanol
    b) Bromobenzene and 1-propanol
    c) Bromobenzene and 1-bromopropane
    d) Phenol and 1-bromopropane
A

d) Phenol and 1-bromopropane

66
Q
  1. Which pair of products would result from the acid
    cleavage of tert-butyl propyl ether with excess
    concentrated HBr at an elevated temperature?
    a) tert-butyl bromide and propyl alcohol
    b) tert-butyl bromide and propyl bromide
    c) tert-butyl alcohol and propyl bromide
    d) 2-methyl-2-butene and propyl bromide
A

b) tert-butyl bromide and propyl bromide

67
Q
  1. Which of the following will be obtained by keeping
    ether in contact with air for a long time?
    a) C2H5−O−CH (CH3)−O−OH
    b) C2H5−OCH2−OH
    c) C2H5−O−C2H5OH
    d) CH3−O CH (CH3)−O−OH
A

d) CH3−O CH (CH3)−O−OH

ChemTech (Organic Chem) (11 decks)

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