Haloalkanes & Haloarenes Practice Questions - DPP for JEE

 Page 1


PART-I (Single Correct MCQs)
1. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with
alcoholic KOH produces
(a) 1-phenylcyclopentene
(b) 3-phenylcyclopentene
(c) 4-phenylcyclopentene
(d) 2-phenylcyclopentene
2. The structure of the major product formed in the following
reaction
   is
Page 2


PART-I (Single Correct MCQs)
1. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with
alcoholic KOH produces
(a) 1-phenylcyclopentene
(b) 3-phenylcyclopentene
(c) 4-phenylcyclopentene
(d) 2-phenylcyclopentene
2. The structure of the major product formed in the following
reaction
   is
(a)
(b)
(c)
(d)
3. Which of the following will have a mesoisomer?
(a) 2, 3- Dichloropentane
(b) 2, 3-Dichlorobutane
(c) 2-Chlorobutane
(d) 2-Hydroxypropanoic acid
4. o-Methoxybromobenzene is treated with sodamide and then with
ammonia. The product formed is
(a) o-Methoxyaniline
(b) Aniline
(c) Methoxybenzene
(d) m-Methoxyaniline
5. Which of the following statements is wrong?
(a) Ethyl chloride on reduction with Zn-Cu couple and alcohol gives ethane.
Page 3


PART-I (Single Correct MCQs)
1. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with
alcoholic KOH produces
(a) 1-phenylcyclopentene
(b) 3-phenylcyclopentene
(c) 4-phenylcyclopentene
(d) 2-phenylcyclopentene
2. The structure of the major product formed in the following
reaction
   is
(a)
(b)
(c)
(d)
3. Which of the following will have a mesoisomer?
(a) 2, 3- Dichloropentane
(b) 2, 3-Dichlorobutane
(c) 2-Chlorobutane
(d) 2-Hydroxypropanoic acid
4. o-Methoxybromobenzene is treated with sodamide and then with
ammonia. The product formed is
(a) o-Methoxyaniline
(b) Aniline
(c) Methoxybenzene
(d) m-Methoxyaniline
5. Which of the following statements is wrong?
(a) Ethyl chloride on reduction with Zn-Cu couple and alcohol gives ethane.
(b) The reaction of methyl magnesium bromide with acetone gives butanol-
2.
(c) Alkyl halides follow the following reactivity sequence on reaction with
alkenes.
R – I > R – Br > R – Cl > R – I
(d) C
2
H
4
Cl
2
 may exist in two isomeric forms
6. An organic compound A (C
4
H
9
Cl) on reaction withNa/diethyl ether
gives a hydrocarbon which on monochlorination gives only one chloro
derivative, then  A is
(a) tert-butyl chloride
(b) sec-butyl chloride
(c) isobutyl chloride
(d) n-butyl chloride
7. The reaction of toluene with in presence of  gives and
reaction in presence of light gives ‘Y’. Thus, ‘X’ and ‘Y’ are :
(a) X = Benzal chloride, Y = o – Chlorotoluene
(b) X = m – Chlorotoluene, Y = p –Chlorotoluene
(c) X = o –and p – Chlorotoluene,
Y = Trichloromethylbenzene
(d) X = Benzyl chloride, Y = m – Chlorotoluene
8. .  The decreasing order of the rate
of the above reaction with nucleophiles (Nu
–
) A to D
is
[Nu
–
 = (A) PhO
–
, (B) AcO
–
, (C) HO
–
, (D) CH
3
O
–
]
(a) A > B > C > D
(b) B > D > C > A
(c) D > C > A > B
(d) D > C > B > A
Page 4


PART-I (Single Correct MCQs)
1. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with
alcoholic KOH produces
(a) 1-phenylcyclopentene
(b) 3-phenylcyclopentene
(c) 4-phenylcyclopentene
(d) 2-phenylcyclopentene
2. The structure of the major product formed in the following
reaction
   is
(a)
(b)
(c)
(d)
3. Which of the following will have a mesoisomer?
(a) 2, 3- Dichloropentane
(b) 2, 3-Dichlorobutane
(c) 2-Chlorobutane
(d) 2-Hydroxypropanoic acid
4. o-Methoxybromobenzene is treated with sodamide and then with
ammonia. The product formed is
(a) o-Methoxyaniline
(b) Aniline
(c) Methoxybenzene
(d) m-Methoxyaniline
5. Which of the following statements is wrong?
(a) Ethyl chloride on reduction with Zn-Cu couple and alcohol gives ethane.
(b) The reaction of methyl magnesium bromide with acetone gives butanol-
2.
(c) Alkyl halides follow the following reactivity sequence on reaction with
alkenes.
R – I > R – Br > R – Cl > R – I
(d) C
2
H
4
Cl
2
 may exist in two isomeric forms
6. An organic compound A (C
4
H
9
Cl) on reaction withNa/diethyl ether
gives a hydrocarbon which on monochlorination gives only one chloro
derivative, then  A is
(a) tert-butyl chloride
(b) sec-butyl chloride
(c) isobutyl chloride
(d) n-butyl chloride
7. The reaction of toluene with in presence of  gives and
reaction in presence of light gives ‘Y’. Thus, ‘X’ and ‘Y’ are :
(a) X = Benzal chloride, Y = o – Chlorotoluene
(b) X = m – Chlorotoluene, Y = p –Chlorotoluene
(c) X = o –and p – Chlorotoluene,
Y = Trichloromethylbenzene
(d) X = Benzyl chloride, Y = m – Chlorotoluene
8. .  The decreasing order of the rate
of the above reaction with nucleophiles (Nu
–
) A to D
is
[Nu
–
 = (A) PhO
–
, (B) AcO
–
, (C) HO
–
, (D) CH
3
O
–
]
(a) A > B > C > D
(b) B > D > C > A
(c) D > C > A > B
(d) D > C > B > A
9. The Wurtz-Fittig reaction involves condensation of :
(a) two molecules of aryl halides.
(b) one molecule of each of aryl-halide and alkyl-halide.
(c) one molecule of each of aryl-halide and phenol.
(d) two molecules of aralkyl-halides.
10. The major organic compound formed by the reaction of1, 1, 1-
trichloroethane with silver powder is:
(a) Acetylene
(b) Ethene
(c) 2 - Butyne
(d) 2 - Butene
11. Which of the following pairs of compounds are enantiomers?
(a)
(b)
(c)
(d)
12. Iodoform can be prepared from all except :
(a) Ethyl methyl ketone
(b) Isopropyl alcohol
(c) 3-Methyl 2-butanone
(d) Isobutyl alcohol
13. The reagent(s) for the following conversion,
Page 5


PART-I (Single Correct MCQs)
1. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with
alcoholic KOH produces
(a) 1-phenylcyclopentene
(b) 3-phenylcyclopentene
(c) 4-phenylcyclopentene
(d) 2-phenylcyclopentene
2. The structure of the major product formed in the following
reaction
   is
(a)
(b)
(c)
(d)
3. Which of the following will have a mesoisomer?
(a) 2, 3- Dichloropentane
(b) 2, 3-Dichlorobutane
(c) 2-Chlorobutane
(d) 2-Hydroxypropanoic acid
4. o-Methoxybromobenzene is treated with sodamide and then with
ammonia. The product formed is
(a) o-Methoxyaniline
(b) Aniline
(c) Methoxybenzene
(d) m-Methoxyaniline
5. Which of the following statements is wrong?
(a) Ethyl chloride on reduction with Zn-Cu couple and alcohol gives ethane.
(b) The reaction of methyl magnesium bromide with acetone gives butanol-
2.
(c) Alkyl halides follow the following reactivity sequence on reaction with
alkenes.
R – I > R – Br > R – Cl > R – I
(d) C
2
H
4
Cl
2
 may exist in two isomeric forms
6. An organic compound A (C
4
H
9
Cl) on reaction withNa/diethyl ether
gives a hydrocarbon which on monochlorination gives only one chloro
derivative, then  A is
(a) tert-butyl chloride
(b) sec-butyl chloride
(c) isobutyl chloride
(d) n-butyl chloride
7. The reaction of toluene with in presence of  gives and
reaction in presence of light gives ‘Y’. Thus, ‘X’ and ‘Y’ are :
(a) X = Benzal chloride, Y = o – Chlorotoluene
(b) X = m – Chlorotoluene, Y = p –Chlorotoluene
(c) X = o –and p – Chlorotoluene,
Y = Trichloromethylbenzene
(d) X = Benzyl chloride, Y = m – Chlorotoluene
8. .  The decreasing order of the rate
of the above reaction with nucleophiles (Nu
–
) A to D
is
[Nu
–
 = (A) PhO
–
, (B) AcO
–
, (C) HO
–
, (D) CH
3
O
–
]
(a) A > B > C > D
(b) B > D > C > A
(c) D > C > A > B
(d) D > C > B > A
9. The Wurtz-Fittig reaction involves condensation of :
(a) two molecules of aryl halides.
(b) one molecule of each of aryl-halide and alkyl-halide.
(c) one molecule of each of aryl-halide and phenol.
(d) two molecules of aralkyl-halides.
10. The major organic compound formed by the reaction of1, 1, 1-
trichloroethane with silver powder is:
(a) Acetylene
(b) Ethene
(c) 2 - Butyne
(d) 2 - Butene
11. Which of the following pairs of compounds are enantiomers?
(a)
(b)
(c)
(d)
12. Iodoform can be prepared from all except :
(a) Ethyl methyl ketone
(b) Isopropyl alcohol
(c) 3-Methyl 2-butanone
(d) Isobutyl alcohol
13. The reagent(s) for the following conversion,
is/are
(a) alcoholic KOH
(b) alcoholic KOH followed by NaNH
2
(c) aqueous KOH followed by NaNH
2
(d) Zn/CH
3
OH
14. In a nucleophilic substitution reaction:
,
which one of the following undergoes complete inversion of configuration?
(a) (C
6
H
5
)
2
CH(Br)
(b) C
6
H
5
CH
2
Br
(c) C
6
H
5
CH(CH
3
)(Br)
(d) (C
6
H
5
)
2
C(CH
3
)(Br)
15. Chlorobenzene reacts with trichloro acetaldehyde in the presence of
H
2
SO
4
.
The major product formed is:
(a)
(b)
(c)