Hydrocarbons (Advanced) - Practice Sheet, Class 12, Chemistry JEE Notes | EduRev

Chemistry for JEE Advanced

JEE : Hydrocarbons (Advanced) - Practice Sheet, Class 12, Chemistry JEE Notes | EduRev

 Page 1


LEARNERS HABITAT
1] Which of these will not react with acetylene? (AIEEE 2002) 
a) NaOH b) ammonical AgNO
3
c) Na d) HCl
2] What is the product when acetylene reacts with hypochlorous acid? (AIEEE 2002) 
a) CH
3
COCl b) ClCH
2
CHO c) Cl
2
CHCHO d) ClCHCOOH
3] On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it
forms only one monochloroalkane. This alkane could be    (AIEEE2003)
a) pentane b) isopentane c) neopentane d) propane
4] Butene-1 may be converted to butane by reaction with
a) Sn - HCl b) Zn - Hg c) Pd/H
2
d) Zn - HCl
5] During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4 
the initiation
step is            (AIEEE 2003)
a) formation of carbocation b) elimination of water
c) formation of an ester d) protonation of alcohol molecule
6] Which one of the following has the minimum boiling point? (AIEEE 2004) 
a) 1-Butene b) 1 - Butyne c) n - Butane d) isobutane
7] Which one of the following is reduced with zinc and hydrochloric acid to give the
corresponding hydrocarbon?    (AIEEE 2004)
a) Acetamide b) Acetic acid c) Ethyl acetate d) Butan -2 one
8] 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly
(AIEEE 2005) 
a) 1-bromo-3-methylbutane b) 2-bromo-3-methylbutane
c) 2-bromo-2-methylbutane d) 1-bromo-2- methylbutane
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
Page 2


LEARNERS HABITAT
1] Which of these will not react with acetylene? (AIEEE 2002) 
a) NaOH b) ammonical AgNO
3
c) Na d) HCl
2] What is the product when acetylene reacts with hypochlorous acid? (AIEEE 2002) 
a) CH
3
COCl b) ClCH
2
CHO c) Cl
2
CHCHO d) ClCHCOOH
3] On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it
forms only one monochloroalkane. This alkane could be    (AIEEE2003)
a) pentane b) isopentane c) neopentane d) propane
4] Butene-1 may be converted to butane by reaction with
a) Sn - HCl b) Zn - Hg c) Pd/H
2
d) Zn - HCl
5] During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4 
the initiation
step is            (AIEEE 2003)
a) formation of carbocation b) elimination of water
c) formation of an ester d) protonation of alcohol molecule
6] Which one of the following has the minimum boiling point? (AIEEE 2004) 
a) 1-Butene b) 1 - Butyne c) n - Butane d) isobutane
7] Which one of the following is reduced with zinc and hydrochloric acid to give the
corresponding hydrocarbon?    (AIEEE 2004)
a) Acetamide b) Acetic acid c) Ethyl acetate d) Butan -2 one
8] 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly
(AIEEE 2005) 
a) 1-bromo-3-methylbutane b) 2-bromo-3-methylbutane
c) 2-bromo-2-methylbutane d) 1-bromo-2- methylbutane
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
9] Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40
o
C  gives
predominantly               (AIEEE 2005)
a) 1-bromo-2-butene under kinetically controlled conditions
b) 3-bromobutene under thermodynamically controlled conditions
c) 1-bromo-2-buteneunder thermodynamically controlled conditions
d) 3-bromobutene under kinetically controlled conditions
10] Acid catalyzed hydration of alkenes except ethene leads to the formation of
(AIEEE 2005) 
a) mixture of secondary and tertiary alcohols
b) mixture of primary and secondary alcohols
c) Secondary or tertiary alcohol
d) primary alcohol
11] Elimination of bromine from 2-bromobutane results in the formation of -
(AIEEE 2005)
a) Predominantly 2-butyne b) Predominantly 1- butene
c) Predominantly 2- butene d) equimolar mixture of 1 and 2-butene
12] HBr reacts with CH
2 
= CH 
__
 OCH
3
 under anhydrous conditions at room temperature
to give      (AIEEE 2006)
a) H
3
C 
__
 CHBr 
__
 OCH
3
b) CH
3
CHO and CH
3
Br
c) BrCH
2
CHO and CH
3
OH d) BrCH
2 
 __
 CH
2
__
 OCH
3
13] Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH
produces     (AIEEE 2006)
a) 3-phenylcyclopentene b) 4-phenylcyclopentene
c) 2-phenylcyclopentene d) 1-phenylcyclopentene
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 2
Page 3


LEARNERS HABITAT
1] Which of these will not react with acetylene? (AIEEE 2002) 
a) NaOH b) ammonical AgNO
3
c) Na d) HCl
2] What is the product when acetylene reacts with hypochlorous acid? (AIEEE 2002) 
a) CH
3
COCl b) ClCH
2
CHO c) Cl
2
CHCHO d) ClCHCOOH
3] On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it
forms only one monochloroalkane. This alkane could be    (AIEEE2003)
a) pentane b) isopentane c) neopentane d) propane
4] Butene-1 may be converted to butane by reaction with
a) Sn - HCl b) Zn - Hg c) Pd/H
2
d) Zn - HCl
5] During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4 
the initiation
step is            (AIEEE 2003)
a) formation of carbocation b) elimination of water
c) formation of an ester d) protonation of alcohol molecule
6] Which one of the following has the minimum boiling point? (AIEEE 2004) 
a) 1-Butene b) 1 - Butyne c) n - Butane d) isobutane
7] Which one of the following is reduced with zinc and hydrochloric acid to give the
corresponding hydrocarbon?    (AIEEE 2004)
a) Acetamide b) Acetic acid c) Ethyl acetate d) Butan -2 one
8] 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly
(AIEEE 2005) 
a) 1-bromo-3-methylbutane b) 2-bromo-3-methylbutane
c) 2-bromo-2-methylbutane d) 1-bromo-2- methylbutane
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
9] Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40
o
C  gives
predominantly               (AIEEE 2005)
a) 1-bromo-2-butene under kinetically controlled conditions
b) 3-bromobutene under thermodynamically controlled conditions
c) 1-bromo-2-buteneunder thermodynamically controlled conditions
d) 3-bromobutene under kinetically controlled conditions
10] Acid catalyzed hydration of alkenes except ethene leads to the formation of
(AIEEE 2005) 
a) mixture of secondary and tertiary alcohols
b) mixture of primary and secondary alcohols
c) Secondary or tertiary alcohol
d) primary alcohol
11] Elimination of bromine from 2-bromobutane results in the formation of -
(AIEEE 2005)
a) Predominantly 2-butyne b) Predominantly 1- butene
c) Predominantly 2- butene d) equimolar mixture of 1 and 2-butene
12] HBr reacts with CH
2 
= CH 
__
 OCH
3
 under anhydrous conditions at room temperature
to give      (AIEEE 2006)
a) H
3
C 
__
 CHBr 
__
 OCH
3
b) CH
3
CHO and CH
3
Br
c) BrCH
2
CHO and CH
3
OH d) BrCH
2 
 __
 CH
2
__
 OCH
3
13] Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH
produces     (AIEEE 2006)
a) 3-phenylcyclopentene b) 4-phenylcyclopentene
c) 2-phenylcyclopentene d) 1-phenylcyclopentene
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 2
14] 
The alkene formed as a major product in the above elimination reaction is 
(AIEEE 2006) 
a) b) c) CH
2 
= CH
2
d) 
15] Which of the following reactions will yield 2, 2-dibromopropane? (AIEEE 2007) 
a) CH
3
- C = CH + 2HBr ? b) CH
3
CH = CHBr + HBr ?
c) CH = CH + 2HBr ? d) CH
3 
__
 CH = CH
2
 + HBr ?
16] The reaction of toluene with Cl
2  
in presence of FeCl
3 
gives predominantly :
(AIEEE 2007) 
a) benzoyl chloride b) benzyl chloride
c) o - and p - chlorotoluene d) m-chlorotoluene
17] Presence of a nitro group in a benzene ring (AIEEE 2007) 
a) activates the ring towards electrophilic substitution
b) renders the ring basic
c) deactivates the ring towards nucleophilic substitution
d) deactivates the ring towards electrophilic substitution.
18] The treatment of CH
3
MgX with CH
3
CC 
__
H produces (AIEEE 2008) 
a) CH
3
C =C 
__
CH
3 
 b) c) CH
4
d) CH
3
__
 CH = CH
2
19] The hydrocarbon which can react with sodium in liquid ammonia is (AIEEE 2008) 
a) CH
3
CH
2
C =CH b) CH
3
CH = CHCH
3
c) CH
3
CH
2
C =CCH
2
CH
3
d) CH
3
CH
2
CH
2
C =CCH
2
CH
2
CH
3
20] In the following sequence of reactions, the alkene affords the compound ‘B’
(AIEEE 2008) 
CH
3
 CH = CHCH
3 
3
O
? ? ?
 
A 
2
H O
Zn
? ? ? ? B The compound B is 
a) CH
3
COCH
3
b) CH
3
CH
2
COCH
3
c) CH
3
CHO d) CH
3
CH
2
CHO
Me
Et
Me
N
Bu  
+
OH
n -
Me
Me
Me
CH
3
C =
H
C
H
CH
3
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 3
Page 4


LEARNERS HABITAT
1] Which of these will not react with acetylene? (AIEEE 2002) 
a) NaOH b) ammonical AgNO
3
c) Na d) HCl
2] What is the product when acetylene reacts with hypochlorous acid? (AIEEE 2002) 
a) CH
3
COCl b) ClCH
2
CHO c) Cl
2
CHCHO d) ClCHCOOH
3] On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it
forms only one monochloroalkane. This alkane could be    (AIEEE2003)
a) pentane b) isopentane c) neopentane d) propane
4] Butene-1 may be converted to butane by reaction with
a) Sn - HCl b) Zn - Hg c) Pd/H
2
d) Zn - HCl
5] During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4 
the initiation
step is            (AIEEE 2003)
a) formation of carbocation b) elimination of water
c) formation of an ester d) protonation of alcohol molecule
6] Which one of the following has the minimum boiling point? (AIEEE 2004) 
a) 1-Butene b) 1 - Butyne c) n - Butane d) isobutane
7] Which one of the following is reduced with zinc and hydrochloric acid to give the
corresponding hydrocarbon?    (AIEEE 2004)
a) Acetamide b) Acetic acid c) Ethyl acetate d) Butan -2 one
8] 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly
(AIEEE 2005) 
a) 1-bromo-3-methylbutane b) 2-bromo-3-methylbutane
c) 2-bromo-2-methylbutane d) 1-bromo-2- methylbutane
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
9] Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40
o
C  gives
predominantly               (AIEEE 2005)
a) 1-bromo-2-butene under kinetically controlled conditions
b) 3-bromobutene under thermodynamically controlled conditions
c) 1-bromo-2-buteneunder thermodynamically controlled conditions
d) 3-bromobutene under kinetically controlled conditions
10] Acid catalyzed hydration of alkenes except ethene leads to the formation of
(AIEEE 2005) 
a) mixture of secondary and tertiary alcohols
b) mixture of primary and secondary alcohols
c) Secondary or tertiary alcohol
d) primary alcohol
11] Elimination of bromine from 2-bromobutane results in the formation of -
(AIEEE 2005)
a) Predominantly 2-butyne b) Predominantly 1- butene
c) Predominantly 2- butene d) equimolar mixture of 1 and 2-butene
12] HBr reacts with CH
2 
= CH 
__
 OCH
3
 under anhydrous conditions at room temperature
to give      (AIEEE 2006)
a) H
3
C 
__
 CHBr 
__
 OCH
3
b) CH
3
CHO and CH
3
Br
c) BrCH
2
CHO and CH
3
OH d) BrCH
2 
 __
 CH
2
__
 OCH
3
13] Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH
produces     (AIEEE 2006)
a) 3-phenylcyclopentene b) 4-phenylcyclopentene
c) 2-phenylcyclopentene d) 1-phenylcyclopentene
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 2
14] 
The alkene formed as a major product in the above elimination reaction is 
(AIEEE 2006) 
a) b) c) CH
2 
= CH
2
d) 
15] Which of the following reactions will yield 2, 2-dibromopropane? (AIEEE 2007) 
a) CH
3
- C = CH + 2HBr ? b) CH
3
CH = CHBr + HBr ?
c) CH = CH + 2HBr ? d) CH
3 
__
 CH = CH
2
 + HBr ?
16] The reaction of toluene with Cl
2  
in presence of FeCl
3 
gives predominantly :
(AIEEE 2007) 
a) benzoyl chloride b) benzyl chloride
c) o - and p - chlorotoluene d) m-chlorotoluene
17] Presence of a nitro group in a benzene ring (AIEEE 2007) 
a) activates the ring towards electrophilic substitution
b) renders the ring basic
c) deactivates the ring towards nucleophilic substitution
d) deactivates the ring towards electrophilic substitution.
18] The treatment of CH
3
MgX with CH
3
CC 
__
H produces (AIEEE 2008) 
a) CH
3
C =C 
__
CH
3 
 b) c) CH
4
d) CH
3
__
 CH = CH
2
19] The hydrocarbon which can react with sodium in liquid ammonia is (AIEEE 2008) 
a) CH
3
CH
2
C =CH b) CH
3
CH = CHCH
3
c) CH
3
CH
2
C =CCH
2
CH
3
d) CH
3
CH
2
CH
2
C =CCH
2
CH
2
CH
3
20] In the following sequence of reactions, the alkene affords the compound ‘B’
(AIEEE 2008) 
CH
3
 CH = CHCH
3 
3
O
? ? ?
 
A 
2
H O
Zn
? ? ? ? B The compound B is 
a) CH
3
COCH
3
b) CH
3
CH
2
COCH
3
c) CH
3
CHO d) CH
3
CH
2
CHO
Me
Et
Me
N
Bu  
+
OH
n -
Me
Me
Me
CH
3
C =
H
C
H
CH
3
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 3
21] Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid.
The product so obtained is diazotised and then heated with cuprous bromide. The
reaction mixture so formed contains.    (AIEEE 2008)
a) mixture of o- and p-dibromobenzenes
b) mixture of o- and p-bromoanilines
c) mixture of o- and m-bromotoluenes
d) mixture of o- and p-bromotoluenes
22] Marsh gas mainly contains
 
(IIT JEE1980, 1M)
 
a) C
2
H
2
b) CH
4
c) H
2
S d) CO
23] Which of the following will decolourise alkaline KMnO
4
 solution ? (IIT JEE1980, 1M)
a) C
3
H
8
b) CH
4
c) CCl
4
d) C
2
H
4
(IIT JEE1982, 1M)
 
a) 2-methyl butane b) n-pentane c) 2, 2-dimethyl propane d) n-hexane
 (IIT JEE1983, 1M)
 
24] The compound with the highest boiling point is
25] The compound 1, 2-butadiene has
a) only sp-hybridised carbon atom
b) only sp
2
-hybridised carbon atoms
c) both sp and sp
2
 - hybridised carbon atoms
d) sp, sp
2
 and sp
3
-hybridised carbon atoms 
26] When propyne is treated with aqueous H
2
SO
4
 in presence of HgSO
4
, the major product
is   (IIT JEE1983, 1M)
a) propanal
c) acetone
b) propyl hydrogen sulphate
d) propanol
27] Which of the following compounds does not dissolve in conc H
2
SO
4
 even on warming
a) Ethylene
b) Benzene (IIT JEE1983, 1M)
 
c) Hexane
28] Baeyer’s reagent is
a) alkaline permanganate solution
c) neutral permanganate solution
d) Aniline
 (IIT JEE1984, 1M)
 
b) acidified permanganate solution
d) aqueous bromine solution
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 4
Page 5


LEARNERS HABITAT
1] Which of these will not react with acetylene? (AIEEE 2002) 
a) NaOH b) ammonical AgNO
3
c) Na d) HCl
2] What is the product when acetylene reacts with hypochlorous acid? (AIEEE 2002) 
a) CH
3
COCl b) ClCH
2
CHO c) Cl
2
CHCHO d) ClCHCOOH
3] On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it
forms only one monochloroalkane. This alkane could be    (AIEEE2003)
a) pentane b) isopentane c) neopentane d) propane
4] Butene-1 may be converted to butane by reaction with
a) Sn - HCl b) Zn - Hg c) Pd/H
2
d) Zn - HCl
5] During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4 
the initiation
step is            (AIEEE 2003)
a) formation of carbocation b) elimination of water
c) formation of an ester d) protonation of alcohol molecule
6] Which one of the following has the minimum boiling point? (AIEEE 2004) 
a) 1-Butene b) 1 - Butyne c) n - Butane d) isobutane
7] Which one of the following is reduced with zinc and hydrochloric acid to give the
corresponding hydrocarbon?    (AIEEE 2004)
a) Acetamide b) Acetic acid c) Ethyl acetate d) Butan -2 one
8] 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly
(AIEEE 2005) 
a) 1-bromo-3-methylbutane b) 2-bromo-3-methylbutane
c) 2-bromo-2-methylbutane d) 1-bromo-2- methylbutane
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
9] Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40
o
C  gives
predominantly               (AIEEE 2005)
a) 1-bromo-2-butene under kinetically controlled conditions
b) 3-bromobutene under thermodynamically controlled conditions
c) 1-bromo-2-buteneunder thermodynamically controlled conditions
d) 3-bromobutene under kinetically controlled conditions
10] Acid catalyzed hydration of alkenes except ethene leads to the formation of
(AIEEE 2005) 
a) mixture of secondary and tertiary alcohols
b) mixture of primary and secondary alcohols
c) Secondary or tertiary alcohol
d) primary alcohol
11] Elimination of bromine from 2-bromobutane results in the formation of -
(AIEEE 2005)
a) Predominantly 2-butyne b) Predominantly 1- butene
c) Predominantly 2- butene d) equimolar mixture of 1 and 2-butene
12] HBr reacts with CH
2 
= CH 
__
 OCH
3
 under anhydrous conditions at room temperature
to give      (AIEEE 2006)
a) H
3
C 
__
 CHBr 
__
 OCH
3
b) CH
3
CHO and CH
3
Br
c) BrCH
2
CHO and CH
3
OH d) BrCH
2 
 __
 CH
2
__
 OCH
3
13] Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH
produces     (AIEEE 2006)
a) 3-phenylcyclopentene b) 4-phenylcyclopentene
c) 2-phenylcyclopentene d) 1-phenylcyclopentene
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 2
14] 
The alkene formed as a major product in the above elimination reaction is 
(AIEEE 2006) 
a) b) c) CH
2 
= CH
2
d) 
15] Which of the following reactions will yield 2, 2-dibromopropane? (AIEEE 2007) 
a) CH
3
- C = CH + 2HBr ? b) CH
3
CH = CHBr + HBr ?
c) CH = CH + 2HBr ? d) CH
3 
__
 CH = CH
2
 + HBr ?
16] The reaction of toluene with Cl
2  
in presence of FeCl
3 
gives predominantly :
(AIEEE 2007) 
a) benzoyl chloride b) benzyl chloride
c) o - and p - chlorotoluene d) m-chlorotoluene
17] Presence of a nitro group in a benzene ring (AIEEE 2007) 
a) activates the ring towards electrophilic substitution
b) renders the ring basic
c) deactivates the ring towards nucleophilic substitution
d) deactivates the ring towards electrophilic substitution.
18] The treatment of CH
3
MgX with CH
3
CC 
__
H produces (AIEEE 2008) 
a) CH
3
C =C 
__
CH
3 
 b) c) CH
4
d) CH
3
__
 CH = CH
2
19] The hydrocarbon which can react with sodium in liquid ammonia is (AIEEE 2008) 
a) CH
3
CH
2
C =CH b) CH
3
CH = CHCH
3
c) CH
3
CH
2
C =CCH
2
CH
3
d) CH
3
CH
2
CH
2
C =CCH
2
CH
2
CH
3
20] In the following sequence of reactions, the alkene affords the compound ‘B’
(AIEEE 2008) 
CH
3
 CH = CHCH
3 
3
O
? ? ?
 
A 
2
H O
Zn
? ? ? ? B The compound B is 
a) CH
3
COCH
3
b) CH
3
CH
2
COCH
3
c) CH
3
CHO d) CH
3
CH
2
CHO
Me
Et
Me
N
Bu  
+
OH
n -
Me
Me
Me
CH
3
C =
H
C
H
CH
3
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 3
21] Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid.
The product so obtained is diazotised and then heated with cuprous bromide. The
reaction mixture so formed contains.    (AIEEE 2008)
a) mixture of o- and p-dibromobenzenes
b) mixture of o- and p-bromoanilines
c) mixture of o- and m-bromotoluenes
d) mixture of o- and p-bromotoluenes
22] Marsh gas mainly contains
 
(IIT JEE1980, 1M)
 
a) C
2
H
2
b) CH
4
c) H
2
S d) CO
23] Which of the following will decolourise alkaline KMnO
4
 solution ? (IIT JEE1980, 1M)
a) C
3
H
8
b) CH
4
c) CCl
4
d) C
2
H
4
(IIT JEE1982, 1M)
 
a) 2-methyl butane b) n-pentane c) 2, 2-dimethyl propane d) n-hexane
 (IIT JEE1983, 1M)
 
24] The compound with the highest boiling point is
25] The compound 1, 2-butadiene has
a) only sp-hybridised carbon atom
b) only sp
2
-hybridised carbon atoms
c) both sp and sp
2
 - hybridised carbon atoms
d) sp, sp
2
 and sp
3
-hybridised carbon atoms 
26] When propyne is treated with aqueous H
2
SO
4
 in presence of HgSO
4
, the major product
is   (IIT JEE1983, 1M)
a) propanal
c) acetone
b) propyl hydrogen sulphate
d) propanol
27] Which of the following compounds does not dissolve in conc H
2
SO
4
 even on warming
a) Ethylene
b) Benzene (IIT JEE1983, 1M)
 
c) Hexane
28] Baeyer’s reagent is
a) alkaline permanganate solution
c) neutral permanganate solution
d) Aniline
 (IIT JEE1984, 1M)
 
b) acidified permanganate solution
d) aqueous bromine solution
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 4
29] Acidic hydrogen is present in (IIT JEE1985, 1M) 
a) ethyne b) ethene c) benzene d) ethane
30] The highest boiling point is expected for (IIT JEE1986, 1M) 
a) iso-butane b) n-octane
c) 2, 2, 3, 3-tetramethyl butane d) n-butane
31] The number of structural and configurational isomers of a bromo compound, C
5
H
9
Br,
formed by the addition of HBr to 2-pentyne respectively, are  (IIT JEE1988, 1M)
a) 1 and 2 b) 2 and 4 c) 4 and 2 d) 2 and 1
32] The compound which has one isopropyl group, is (IIT JEE1989, 1M)
 
a) 2, 2, 3, 3-tetramethyl pentane b) 2, 2-dimethyl pentane
c) 2, 2, 3-trimethyl pentane d) 2-methyl pentane
33] The C - H bond distance is the longest in (IIT JEE1989, 1M) 
a) C
2
H
2
b) C
2
H
4
c) C
2
H
6
d) C
2
H
2
Br
2
34] When cyclohexane is poured on water, it floats, because (IIT JEE1997, 1M)
 
a) cyclohexane is in boat form b) cyclohexane is in chair form
c) cyclohexane is in crown form d) cyclohexane is less dense than water
 OH with HBr gives  35] The reaction of CH
3
CH = CH
a) CH
3
CHBrCH
2
OH 
c) CH
3
CHBrCH
2
Br 
b) CH
3
CH
2
CHBr
d) CH
3
CH
2
CHBr
  (IIT JEE1998, 2M) 
OH 
Br 
36] In the compound  CH
2
 = CH 
__
 CH
2
  
__
 CH
2
 
__
 C = CH, the C
2
 
__
 C
3
 bond is of the
type
a) sp - sp
2
b) sp
3
 - sp
3 
(IIT JEE1999, 2M) 
c) sp - sp
3
d) sp
2
 - sp
3
LH Practice Sheet HYDROCARBONS
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 5
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