Practice Questions on Organic Compounds containing Halogens:

Ques. DDT is
(a) A solid
(b) A liquid
(c) A gas
(d) A solution

Ans. (a)

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

Ans. (c)

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

Ans. (a)

Ques. The total number of stereoisomeric forms of C₆H₆Cl₆ known is
(a) 6
(b) 7
(c) 8
(d) None of these

Ans. (c)

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

Ans. (b)

Ques. Benzene hexachloride is prepared from benzene and chlorine in sunlight by
(a) Substitution reaction
(b) Elimination reaction
(c) Addition reaction
(d) Rearrangement

Ans. (c)

Ques. By heating a mixture of CHCl₃with silver powder, the compound formed is
(a) Acetylene
(b) Silver acetate
(c) Methanol
(d) None of these

Ans. (a)

Ques. When ethyl bromide reacts with sodium acetylide the main product is?
(a) 1-butane
(b) 1-butene
(c) 1-butyne
(d) 2-butene

Ans. (c)

Ques. When chloroform is exposed to air and sunlight, it gives:
(a) Carbon tetrachloride
(b) Carbonyl chloride
(c) Mustard gas
(d) Lewsite

Ans. (b)

Ques. Which of the following compounds does not undergo nucleophilic substitution reactions?
(a) Vinyl chloride
(b) Ethyl bromide
(c) Benzyl chloride
(d) Isopropyl chloride

Ans. (a)

Ques. One of the following that cannot undergo dehydro-halogenation is
(a) Iso-propyl bromide
(b) Ethanol
(c) Ethyl bromide
(d) None of these

Ans. (b)

Ques. Among the following one with the highest percentage of chlorine is?
(a) Chloral
(b) Pyrene
(c) PVC
(d) Gammexene

Ans. (b)

Related: questions on Biot Savart law

Ques. Ethylene difluoride on hydrolysis gives
(a) Glycol
(b) Fluoroethanol
(c) Difluoroethanol
(d) Freon

Ans. (a)

Ques. An important insecticide is obtained by the action of chloral on chlorobenzene. It is
(a) BHC
(b) Gammexene
(c) DDT
(d) Lindane

Ans. (c)

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

Ans. (b)

Ques. Chloropicrin is used as
(a) Solvent
(b) Anaesthetic
(c) Perfume
(d) Tear gas

Ans. (d)

Ques. Ethylene reacts with bromine to form
(a) Chloroethane
(b) Ethylene dibromide
(c) Cyclohexane
(d) 1-bromo propane

Ans. (b)

Ques. A Grignard’s reagent may be made by reacting magnesium with
(a) Methyl amine
(b) Diethyl ether
(c) Ethyl iodide
(d) Ethyl alcohol

Ans. (c)

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

Ans. (d)

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

Ans. (b)