Practice Questions on Organic Compounds containing Halogens:
Ques. DDT is
(a) A solid
(b) A liquid
(c) A gas
(d) A solution
Ques. The C – Cl bond in chlorobenzene as compared with C – Cl bond in methyl chloride is
(a) Longer and weaker
(b) Shorter and weaker
(c) Shorter and stronger
(d) Longer and stronger
Ques. Reaction of alkyl halides with aromatic compounds in presence of anhydrous AlCl3 is known as
(a) Friedal-Craft reaction
(b) Hofmann degradation
(c) Kolbe’s synthesis
(d) Beckmann rearrangement
Ques. The total number of stereoisomeric forms of C6H6Cl6 known is
(a) 6
(b) 7
(c) 8
(d) None of these
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Ques. The reaction between chlorobenzene and chloral in the presence of concentrated sulphuric acid produces
(a) Gammexane
(b) p,p-dichloro diphenyl trichloro ethane
(c) Chloropicrin
(d) Benzene hexachloride
Ques. Benzene hexachloride is prepared from benzene and chlorine in sunlight by
(a) Substitution reaction
(b) Elimination reaction
(c) Addition reaction
(d) Rearrangement
Ques. By heating a mixture of CHCl3 with silver powder, the compound formed is
(a) Acetylene
(b) Silver acetate
(c) Methanol
(d) None of these
Ques. When ethyl bromide reacts with sodium acetylide the main product is?
(a) 1-butane
(b) 1-butene
(c) 1-butyne
(d) 2-butene
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Ques. When chloroform is exposed to air and sunlight, it gives:
(a) Carbon tetrachloride
(b) Carbonyl chloride
(c) Mustard gas
(d) Lewsite
Ques. Which of the following compounds does not undergo nucleophilic substitution reactions?
(a) Vinyl chloride
(b) Ethyl bromide
(c) Benzyl chloride
(d) Isopropyl chloride
Ques. One of the following that cannot undergo dehydro-halogenation is
(a) Iso-propyl bromide
(b) Ethanol
(c) Ethyl bromide
(d) None of these
Ques. Among the following one with the highest percentage of chlorine is?
(a) Chloral
(b) Pyrene
(c) PVC
(d) Gammexene
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Ques. Ethylene difluoride on hydrolysis gives
(a) Glycol
(b) Fluoroethanol
(c) Difluoroethanol
(d) Freon
Ques. An important insecticide is obtained by the action of chloral on chlorobenzene. It is
(a) BHC
(b) Gammexene
(c) DDT
(d) Lindane
Ques. The reactivity of ethyl chloride is
(a) More or less equal to that of benzyl chloride
(b) More than that of benzyl chloride
(c) More or less equal to that of chlorobenzene
(d) Less than that of chlorobenzene
Ques. Chloropicrin is used as
(a) Solvent
(b) Anaesthetic
(c) Perfume
(d) Tear gas
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Ques. Ethylene reacts with bromine to form
(a) Chloroethane
(b) Ethylene dibromide
(c) Cyclohexane
(d) 1-bromo propane
Ques. A Grignard’s reagent may be made by reacting magnesium with
(a) Methyl amine
(b) Diethyl ether
(c) Ethyl iodide
(d) Ethyl alcohol
Ques. Preparation of alkyl halides in laboratory is least preferred by
(a) Treatment of alcohols
(b) Addition of hydrogen halides to alkenes
(c) Halide exchange
(d) Direct halogenation of alkanes
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Ques. What is the main product of the reaction between 2-methyl propene with HBr
(a) 1-bromo butane
(b) 1-bromo-2 methyl propane
(c) 2-bromo butane
(d) 2-bromo-2 methyl propane
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