Q.1.
ion Q31) The two optical isomers given below, namely are [ Kerala EEE 2003]
-
27%
a) enantiomers
-
47%
b) geometrical isomers
-
27%
c) diastereomers
-
0%
d) structural isomers
Q.2.
The molecule having dipole moment is ...[ Pb. CET 1999]
-
40%
a) 2, 2-Dimethylpropane
-
40%
b) trans-2-Pentene
-
0%
c) Hexane
-
20%
d) 2,2,3,3-Tetramethylbutane
Q.3.
Which of the following has the lowest dipole moment? [ IIT 2002]
-
40%
a) CH2=CH - C ≡ CH
-
20%
b) CH3 - C ≡ C - CH3
-
0%
c) CH3CH2C ≡ CH
-
40%
d)
Q.4.
Cis-trans isomers generally ..[ Kerala CET 2003]
-
43%
a) Contain an asymmetric carbonatom
-
29%
b) rotate the plane of polarizedlight
-
29%
c) are enatiomorphs
-
0%
d) contain double bonedcarbon atoms
Q.5.
An organic compound C4H8O,is found to beoptically active. Which of the following could it be? [ ISM Dhanbad 94]
-
17%
a) CH3 - CO- CH2 - CH3
-
0%
b) CH3- CH2- CH2 - CHO
-
33%
c) (CH3)2CH-CHO
-
50%
d) CH2 = CH - CH(OH)- CH3
Q.6.
A functional isomerof 1-butyne is ..[ Raj.PMT 1998]
-
0%
a) 2-Butyne
-
43%
b) 1-Butene
-
29%
c) 2-Butene
-
29%
d) 1, 3-Butadiene
Q.7.
ion Q37) In the reaction an asymmetriccentre is generated. The acid obtained would be ..[ CBSE PMT 2003]
-
0%
a) D-isomer
-
0%
b) L-isomer
-
33%
c) 50% D+ 50% L-isomer
-
67%
d) 20% D + 80% L-isomer
Q.8.
ion Q38) The two compounds shown in the figure below are
-
33%
a) Diastereomers
-
67%
b) Enantiomers
-
0%
c) Epimers
-
0%
d) Regiomers
Q.9.
ion Q39) The stability of the compounds ...
-
57%
a) iv > iii > i > ii
-
29%
b) i > iii > ii > iv
-
14%
c) ii > iii > i > iv
-
0%
d) iv > i > iii > ii
Q.10.
How many structireal ( including steroisomers) isomers could be obtained by replacing one hydrogen of propene with chlorine?
-
0%
a) 2
-
50%
b) 4
-
17%
c) 3
-
33%
d) 5
Explanation
Q.11.
The number of stereisomers for pent-3-en-2-ol is ..[ Haryana CEET 2000 ]
-
0%
a) 2
-
40%
b) 4
-
40%
c) 3
-
20%
d) 5
Explanation
Q.12.
The number of ether metamers represented by the formula C4H10O is
-
14%
a) 4
-
71%
b) 3
-
14%
c) 2
-
0%
d) 1
Q.13.
Which of the following haszero dipole moment? [ CBSE PMT 1996]
-
0%
a) cis--2-Butene
-
60%
b) trans-2-Butene
-
0%
c) 1-Butene
-
40%
d) 2 Methyl-1-propene
Q.14.
The number of isomers for the compound with molecularformula C2BrClFI is ..[IIT 2001]
-
47%
a) 3
-
18%
b) 4
-
24%
c) 5
-
12%
d) 6
Q.15.
Which of the following is an optically active compound? [ CBSE PMT 1988]
-
0%
a) 1-Butanol
-
17%
b) 1-Propanol
-
50%
c) 2-Chlorobutane
-
33%
d) 4-Hydroxyheptane
Q.16.
Which of the following compound is not chiral ..[ CBSE PMT 1998]
-
33%
a) DCH2CH2CH2Cl
-
33%
b) CH3CHDCH2Cl
-
0%
c) CH3CHClCH2D
-
33%
d) CH3CH2CHDCl
Q.17.
ion Q47) The correct statement about following A, B, C is ... [ IIT 1997]
-
17%
a) A and B are identical
-
17%
b) A and B are diasteremores
-
50%
c) A and C are enantiomers
-
17%
d) A and B are enantiomers
Q.18.
But-2-ene exhibits cis-trans-isomerism due to ..[ CBSE PMT 2000 ]
-
25%
a) rotation around C3 -C3 sigma bond
-
25%
b) restricted rotation around C=C bond
-
0%
c) rotation around C1-C2bond
-
50%
d) rotation around C2-C3 double bond
Q.19.
How many cyclic isomers of C5H10are possible? [ DPMT 2000 ]
-
40%
a) 4
-
20%
b) 3
-
40%
c) 7
-
0%
d) 5
Q.20.
meso- Tartaric acid is optically inactive due to the presence of ..
-
50%
a) Molecular symmetry
-
25%
b) Molecular asymmetry
-
0%
c) External compensation
-
25%
d) Two asymmetric carbon atoms
Q.21.
Optical activityis measured by ...[ AFMC 1995]
-
33%
a) Polarimeter
-
33%
b) Refractometer
-
0%
c) Spectograph
-
33%
d) Tracer technique
Q.22.
The number of enantiomers of the compound CH3CHBrCHBrCOOHis..[AIIMS 1997]
-
0%
a) 0
-
0%
b) 1
-
50%
c) 3
-
50%
d) 4
Q.23.
Isomers of propionic acid are
-
33%
a) HCOOC2H5 and CH3COOCH3
-
33%
b) HCOOC2H5 and C3H7COOCH
-
33%
c) CH3COOCH3 and C3H7OH
-
0%
d) C3H7OH and CH3COCH3
Q.24.
The number of isomers possible for C7H8O is
-
0%
a) 2
-
50%
b) 3
-
0%
c) 4
-
50%
d) 5
Q.25.
Which of the following willhave least hindered rotation about carbon-carbon bond? [ IIT 1987]
-
40%
a) Ethane
-
20%
b) Ethylene
-
20%
c) Acetylene
-
20%
d) Hexachloethane
Q.26.
An isomer of propanal is ..[KErala CEE 2000 ]
-
20%
a) Acetone
-
20%
b) Propane
-
20%
c) Ethanol
-
40%
d) Propionic acid
Q.27.
ion Q57) The product would be ...[ Pb,. PMT 1998]
-
20%
a) a racemate
-
0%
b) oprically active
-
60%
c) a meso compound
-
20%
d) a mixture of diasteromers
Q.28.
Theleat number of carbon atoms is alkane forming isomers is ...[ Pb. CET 1997]
-
0%
a) 3
-
0%
b) 1
-
100%
c) 2
-
0%
d) 4
Q.29.
C3H9N cannot represent ..[ BHU 2000 ]
-
0%
a) 1° Amines
-
25%
b) 2° Amines
-
50%
c) 3° Amines
-
25%
d) Quaternary salt
Q.30.
An important chemical method to resolve a racemic mixture makes use of the formationof ... [ CBSE PMT 1994]
-
14%
a) a meso compound
-
29%
b) enantiomers
-
29%
c) diasteromers
-
29%
d) racemates