Halogen Containing Organic Compounds Flashcards
- Which C-X bond has the highest bond energy per mole?
a) C-Br
b) C-Cl
c) C-F
d) C-I
c) C-F
- Which alkyl halide has the highest reactivity for a
particular alkyl group?
a) R-F
b) R-Cl
c) R-I
d) R-Br
c) R-I
- When ethyl chloride reacts with nascent hydrogen, what
is the formed product?
a) Methane
b) Propane
c) Butane
d) Ethane
d) Ethane
- 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) Primary alkyl halide
- 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
b) (CH3)2CH-X
- 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
d) 1 moles of butane
- 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) 5 chlorine atoms
- 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) 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
d) Hydration of alkene
- 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
d) they have an electrophilic carbon & a good leaving
group
- 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) Raschig process
- 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
c) SOCl2/ Pyridine
- 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) Chlorobenzene is less reactive than benzyl chloride
- What will be the product for the given reaction?
a) CCl3CHO
b) C6H6Cl6
c) C6H12Cl6
d) C6H9Cl2
b) C6H6Cl6
- 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
c) Bright sunlight
- What is the IUPAC name of chloroform?
a) Dichloromethane
b) Trichloromethane
c) Chloromethane
d) Carbon tetrachloride
b) Trichloromethane
- 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
c) Freon initiates radical chain reactions in stratosphere
- Central nervous system can be depressed by the use of
which of the following:
a) Chloroform
b) Freon
c) Iodoform
d) DDT
a) Chloroform
- 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
c) They deplete ozone layer
- Which one of the following is the correct formula of
methylene dichloride?
a) ClCH = CHCl
b) ClC ≡ CCl
c) CH2Cl2
d) CH2(Cl) CH2Cl
c) CH2Cl2
- How Benzene hexachloride (BHC) is used?
a) Insecticides
b) Fertilizers
c) Anaesthetics
d) Antiseptics
a) Insecticides
- Which is the correct formula of Freon-12?
a) CCl2F2
b) CClF3
c) CHCl2F
d) CCl3F
a) CCl2F2
- Depletion of Ozone is believed to increase which of the
following?
a) Population
b) Ultraviolet rays
c) Pollution
d) Greenery
b) Ultraviolet rays
- 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
d) 4-heptanone
- Which is not present in Grignard reagent?
a) Methyl group
b) Magnesium
c) Halogen
d) −COOH group
d) −COOH group
- 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
b) Warming them with magnesium powder in dry ether
- 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
c) Ethyl iodide
- 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
b) An organosodium compound is not very reactive
compared to a Grignard reagent
- 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
c) Pentanal
- 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
b) acetaldehyde
- 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
d) Oxirane
- 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
b) ethylene oxide
- Which of the following vinyl halide has industrial
application?
a) Vinyl fluoride
b) Vinyl chloride
c) Vinyl bromide
d) Vinyl iodide
b) Vinyl chloride
- 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
c) Allylic bonds are often weaker and therefore more easily
broken
- 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) H2C = CH−CH2Cl
- 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
c) By adding magnesium
- 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) 1,1-dichloroethane
- 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
d) BASF process
- 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) Mixture of secondary and tertiary alcohols
- 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) 2-chloro-1,3-dibutadiene