Q.1.
on Q151) 'A" predominantly in following reaction is [ AIPMT 2008]
-
0%
a)
-
29%
b)
-
29%
c)
-
43%
d)
Explanation
Q.2.
Fischer-Trops process is used in the manufacture of ... [ AFMC 1994]
-
83%
a) Synthetic petroleum
-
0%
b) Ethanol
-
17%
c) Benzene
-
0%
d) Ethanoic acid
Q.3.
on Q153) Identify the product (Y) in the following reaction sequence : [ CET Karnataka 2006]
-
17%
a) cyclobutane
-
50%
b) cyclopentane
-
33%
c) pentane
-
0%
d) cyclopentanone
Explanation
Q.4.
Which of the following has dipole moment?
-
33%
a) trans-2-butene
-
17%
b) 1-propene
-
33%
c) cis-2-butene
-
17%
d) Both a and b
Q.5.
Which of the following has highest knocking property? AFMC 2007]
-
29%
a) Aromatic hydrocarbons
-
14%
b) Olefins
-
29%
c) Branched chain paraffins
-
29%
d) Stright chain parafiins
Q.6.
Addition of one equivalent of Br2 to 1,3-pentadiene produces ...
-
0%
a) 4,5-Dibromo-2-pentene
-
17%
b) 1,4-Dibromo-2-pentene
-
50%
c) 3,4 - Dibromopentene
-
33%
d) 3,4-Dibromo -2-pentene
Q.7.
arbons gneetStudy Companion For more NEET and AIIMS mcq on Hydrocarbons Q157) Baeyer's reacgent is ... [ IIT 1984
-
50%
a) alkaline permanganate solution
-
25%
b) acidified permaganate solution
-
25%
c) neutral permaganet solution
-
0%
d) aqueous bromine solution
Q.8.
Which of the following compounds will exhibit geometrical isomerism? [ IIT 2015 Mains]
-
60%
a) 1-phenyl-2-butene
-
0%
b) 3-phenyl-1-butene
-
40%
c) 2-phenyl-1-butene
-
0%
d) 1, 1-diphenyl-1-propane
Explanation
Q.9.
Meta-directing and deactivating group in aromatic electrophilic substitution is ...[ Kerala PMT 2012]
-
40%
a) - NO2
-
20%
b) - OH
-
0%
c) - Cl
-
40%
d) -CH3
Q.10.
When an alkyl iodide is treated with Na in dry ether,a symmetrical alkane ()R2) is obtained. the reaction is called ... [ DEC 1994]
-
0%
a) Grignard reaction
-
40%
b) Fischer-Tropsch reaction
-
0%
c) Berguis reaction
-
60%
d) Wurtz reaction
Q.11.
When C2H2, CH4 and C2H4 passes through a test tube which have ammoniacal Cu2Cl2, find out which gas comes out unaffected from test tube? [ BCECE 2008]
-
50%
a) C2H2 and CH4
-
0%
b) C2H2 and C2H4
-
33%
c) C2H2
-
17%
d) C2H4 and CH4
Q.12.
Benzene on treatment with amxiture of conc. HNO3 and conc.H2SO4 at 100°C gives ..[ JIPMER 1994]
-
20%
a) Nitrobenzne
-
20%
b) m-dinitrobenzne
-
20%
c) p- dinitrobenzne
-
40%
d) o-dinitrobenzne
Q.13.
Which compound can not be formed from Wurtz reaction? [ CPMT 2010]
-
20%
a) propane
-
0%
b) ethane
-
40%
c) butane
-
40%
d) methane
Q.14.
Which one of the following is not an aromatic? [ J &K CET 2011]
-
0%
a) Cyclopentadienyl anion
-
20%
b) Cycloheptatrienyl cation
-
20%
c) Thiophene
-
60%
d) Cyclooctatetraene
Q.15.
on Q167) Thr principal; organic product formed in the reaction
-
0%
a) CH3CHNr(CH2)8COOH
-
20%
b) CH2 = CH(CH2)8COBr
-
60%
c) CH2BrCH2(CH2)8COOH
-
20%
d) CH2=CH(CH2)7CHBrCOOH
Q.16.
Position of double bond in alkenes can be identified by .. [ DEC 2001]
-
0%
a) Bromine water
-
40%
b) Ammonical silver nitrate solution
-
60%
c) Ozonolysis
-
0%
d) None of these
Q.17.
on Q169) Among the following compounds, the decreasing order of reactivity towards electrophilic substitution is ...[ AIPMT 2001]
-
0%
a) III > I > II > IV
-
40%
b) IV > I > II > III
-
40%
c) I > II > III > IV
-
20%
d) II > I > III > IV
Q.18.
on The reagent(s) for the following conversion is/are ...[ IIT 2007]
-
0%
a) alcoholic KOH
-
100%
b) alcoholic KOH followed by NaNH2
-
0%
c) aqueous KOH followed by NaNH2
-
0%
d) Zn/CH3OH
Explanation
Q.19.
Name the reagent used to bring about the following transformation; but-2-ene to ethanal... [ AMU 2010]
-
0%
a) K2Cr2O7 in acidic medium
-
20%
b) CrO2Cl2/H3O+
-
20%
c) PCC
-
60%
d) O3/H2O-Zn dust
Explanation
Q.20.
R-CH2 - CCl2-R + A → R-C ≡C - R. Reagent A is .. [ CBSE PMT 1989]
-
0%
a) Na
-
0%
b) HCl + H2O
-
80%
c) KOH in C2H5OH
-
20%
d) Zn in alcohol
Q.21.
Which one of the following alkenes will react faster with H2 under catalytic hydrogenation condition? [ AIPMT 2005]
-
20%
a)
-
40%
b)
-
20%
c)
-
20%
d)
Explanation
Q.22.
Two organic compounds A and B both containing only carbon and hydrogen,on quantitive analysis gave the same percentage composition by weight C =(12/13)×100%, H = (1/13)×100% A decolourises brominewater but B does not. A and B respectively are
-
17%
a) C2H2 and C6H6
-
0%
b) C6H6 and C2H2
-
67%
c) C2H4 and C2H6
-
17%
d) C2H2 and C2H6
Q.23.
Which of the following lowest octane number? [ CMC 2007]
-
40%
a) n-Hexadecane
-
20%
b) iso-Octane
-
0%
c) n-Hexane
-
40%
d) n-Heptane
Q.24.
Reduction of 2-butyne with sodium inliquid ammonia gives predominantly ..[ CBSE PMT 1993]
-
0%
a) cis--Butene
-
20%
b) No reaction
-
80%
c) trans-2-Butene
-
0%
d) n-butane
Q.25.
In the following reaction , the major product is [AIPMT 2012]
-
0%
a)
-
60%
b)
-
20%
c)
-
20%
d)
Explanation
Q.26.
The function of AlCl3 in the Friedal-Crafts reaction is ...[Haryana CEET 1998]
-
0%
a) to absorb water
-
20%
b) to absorb HCl
-
60%
c) to produce electrophile
-
20%
d) to produce nucleophile
Q.27.
Both methane and ethane can be prepared in one stape from
-
0%
a) CH3CH2I
-
33%
b) CH3Br
-
33%
c) C2H5OH
-
33%
d) CH3OH
Q.28.
(CH3)3 CMgCl on reaction with D2O produces ..[ IIT 1997]
-
75%
a) (CH3)3CD
-
0%
b) (CH3)3OD
-
0%
c) (CD3)3CD
-
25%
d) (CD3)3OD
Explanation
Q.29.
Which of the following compound will exhibit cis-trans ( geometrical) isomerism? [ AIMPT 2009]
-
20%
a) Butan-2-ol
-
0%
b) But-2-yne
-
0%
c) 2-Butenol
-
80%
d) But-2-ene
Explanation
Q.30.
In Wurtz reaction, the reagent used is ...[ EAMCET 1998]
-
0%
a) Na
-
0%
b) Na/liqNH3
-
60%
c) Na/dry ether
-
40%
d) Na/ dry alcohol