MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Chemistry MCQ
Isomerism And Steroisomerism Mcq Neet Chemistry
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
ion Q31) The two optical isomers given below, namely are [ Kerala EEE 2003]
0%
a) enantiomers
0%
b) geometrical isomers
0%
c) diastereomers
0%
d) structural isomers
Explanation
Given isomers are not mirror image hence diastereomers Answer:(c)
Q.2
The molecule having dipole moment is ...[ Pb. CET 1999]
0%
a) 2, 2-Dimethylpropane
0%
b) trans-2-Pentene
0%
c) Hexane
0%
d) 2,2,3,3-Tetramethylbutane
Explanation
Answer:(b)
Q.3
Which of the following has the lowest dipole moment? [ IIT 2002]
0%
a) CH2=CH - C ≡ CH
0%
b) CH3 - C ≡ C - CH3
0%
c) CH3CH2C ≡ CH
0%
d)
Explanation
Answer:(b)
Q.4
Cis-trans isomers generally ..[ Kerala CET 2003]
0%
a) Contain an asymmetric carbonatom
0%
b) rotate the plane of polarizedlight
0%
c) are enatiomorphs
0%
d) contain double bonedcarbon atoms
Explanation
Answer:(d)
Q.5
An organic compound C4H8O,is found to beoptically active. Which of the following could it be? [ ISM Dhanbad 94]
0%
a) CH3 - CO- CH2 - CH3
0%
b) CH3- CH2- CH2 - CHO
0%
c) (CH3)2CH-CHO
0%
d) CH2 = CH - CH(OH)- CH3
Explanation
-CH(OH)- is a chiral carbon Answer:(d)
Q.6
A functional isomerof 1-butyne is ..[ Raj.PMT 1998]
0%
a) 2-Butyne
0%
b) 1-Butene
0%
c) 2-Butene
0%
d) 1, 3-Butadiene
Explanation
Answer:(d)
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
0%
c) 50% D+ 50% L-isomer
0%
d) 20% D + 80% L-isomer
Explanation
A racemicmixture is always produced whenever as new chiral carbon atom is generated in a reaction. Thus, 50% D and 50% L isomers are produced Answer:(c)
Q.8
ion Q38) The two compounds shown in the figure below are
0%
a) Diastereomers
0%
b) Enantiomers
0%
c) Epimers
0%
d) Regiomers
Explanation
Images are not superimposable Answer:(b)
Q.9
ion Q39) The stability of the compounds ...
0%
a) iv > iii > i > ii
0%
b) i > iii > ii > iv
0%
c) ii > iii > i > iv
0%
d) iv > i > iii > ii
Explanation
According to Nayer's strain theory shorter the angle more the strain on bond. Answer:(a)
Q.10
How many structireal ( including steroisomers) isomers could be obtained by replacing one hydrogen of propene with chlorine?
0%
a) 2
0%
b) 4
0%
c) 3
0%
d) 5
Explanation
Answer:(b)
Q.11
The number of stereisomers for pent-3-en-2-ol is ..[ Haryana CEET 2000 ]
0%
a) 2
0%
b) 4
0%
c) 3
0%
d) 5
Explanation
pent-3-en-2-ol shows both geometrical and optical isomers, in all four stereoisomers possible Answer:(b)
Q.12
The number of ether metamers represented by the formula C4H10O is
0%
a) 4
0%
b) 3
0%
c) 2
0%
d) 1
Explanation
Three CH3.OCH2CH2CH3, CH32OCH2CH3, CH3OCH(CH3)2 Answer:(b)
Q.13
Which of the following haszero dipole moment? [ CBSE PMT 1996]
0%
a) cis--2-Butene
0%
b) trans-2-Butene
0%
c) 1-Butene
0%
d) 2 Methyl-1-propene
Explanation
Answer:(b)
Q.14
The number of isomers for the compound with molecularformula C2BrClFI is ..[IIT 2001]
0%
a) 3
0%
b) 4
0%
c) 5
0%
d) 6
Explanation
Answer:(d)
Q.15
Which of the following is an optically active compound? [ CBSE PMT 1988]
0%
a) 1-Butanol
0%
b) 1-Propanol
0%
c) 2-Chlorobutane
0%
d) 4-Hydroxyheptane
Explanation
Answer:(c)
Q.16
Which of the following compound is not chiral ..[ CBSE PMT 1998]
0%
a) DCH2CH2CH2Cl
0%
b) CH3CHDCH2Cl
0%
c) CH3CHClCH2D
0%
d) CH3CH2CHDCl
Explanation
Only DCH2CH2CH2Cl donot contain a chiral carbon and hence it is not chiral Answer:(a)
Q.17
ion Q47) The correct statement about following A, B, C is ... [ IIT 1997]
0%
a) A and B are identical
0%
b) A and B are diasteremores
0%
c) A and C are enantiomers
0%
d) A and B are enantiomers
Explanation
Rotation of B through 180° within the plane of paper which is an enantiomer of (A) thus A and B eantiomers Answer:(d)
Q.18
But-2-ene exhibits cis-trans-isomerism due to ..[ CBSE PMT 2000 ]
0%
a) rotation around C3 -C3 sigma bond
0%
b) restricted rotation around C=C bond
0%
c) rotation around C1-C2bond
0%
d) rotation around C2-C3 double bond
Explanation
Answer:(b)
Q.19
How many cyclic isomers of C5H10are possible? [ DPMT 2000 ]
0%
a) 4
0%
b) 3
0%
c) 7
0%
d) 5
Explanation
cyclopentane, methyl cyclobutane, ethyl cyclopropane, cyclopropane, cis-1,2-dimethyl cyclopropane Answer provided by Mohammad Danis Answer:(d)
Q.20
meso- Tartaric acid is optically inactive due to the presence of ..
0%
a) Molecular symmetry
0%
b) Molecular asymmetry
0%
c) External compensation
0%
d) Two asymmetric carbon atoms
Explanation
presence of a plane symmetry in the molecule, meso- Tartaric acid optically inactive due to the presence of .. Answer:(a)
Q.21
Optical activityis measured by ...[ AFMC 1995]
0%
a) Polarimeter
0%
b) Refractometer
0%
c) Spectograph
0%
d) Tracer technique
Explanation
Answer:(a)
Q.22
The number of enantiomers of the compound CH3CHBrCHBrCOOHis..[AIIMS 1997]
0%
a) 0
0%
b) 1
0%
c) 3
0%
d) 4
Explanation
Compound contains two dissimilar chiral carbon atoms and hence22 = 4 enantiomers are possible Answer:(d)
Q.23
Isomers of propionic acid are
0%
a) HCOOC2H5 and CH3COOCH3
0%
b) HCOOC2H5 and C3H7COOCH
0%
c) CH3COOCH3 and C3H7OH
0%
d) C3H7OH and CH3COCH3
Explanation
HCOOC2H5 and CH3COOCH3 are isomers of propionic acid Answer:(a)
Q.24
The number of isomers possible for C7H8O is
0%
a) 2
0%
b) 3
0%
c) 4
0%
d) 5
Explanation
C6H5OH (benzyl alcohol, C6H5PCH3 (anisole), o-, m-, p- cresols Answer:(d)
Q.25
Which of the following willhave least hindered rotation about carbon-carbon bond? [ IIT 1987]
0%
a) Ethane
0%
b) Ethylene
0%
c) Acetylene
0%
d) Hexachloethane
Explanation
Because of the bigger size of Cl than H, the rotation about carbon-carbon single bond in hexa-chloroethane is morehindered than in ethane. On the other hand, because of the presence of double bond in ethyne, and triplebond in acetylene, the roation about carbon-carbon bond is highly hindered. Thus ethane has the least hindered rotation Answer:(a)
Q.26
An isomer of propanal is ..[KErala CEE 2000 ]
0%
a) Acetone
0%
b) Propane
0%
c) Ethanol
0%
d) Propionic acid
Explanation
Answer:(a)
Q.27
ion Q57) The product would be ...[ Pb,. PMT 1998]
0%
a) a racemate
0%
b) oprically active
0%
c) a meso compound
0%
d) a mixture of diasteromers
Explanation
Answer:(a)
Q.28
Theleat number of carbon atoms is alkane forming isomers is ...[ Pb. CET 1997]
0%
a) 3
0%
b) 1
0%
c) 2
0%
d) 4
Explanation
butane have two isomers n-buane and isobutane Answer:(d)
Q.29
C3H9N cannot represent ..[ BHU 2000 ]
0%
a) 1° Amines
0%
b) 2° Amines
0%
c) 3° Amines
0%
d) Quaternary salt
Explanation
Answer:(d)
Q.30
An important chemical method to resolve a racemic mixture makes use of the formationof ... [ CBSE PMT 1994]
0%
a) a meso compound
0%
b) enantiomers
0%
c) diasteromers
0%
d) racemates
Explanation
Answer:(c)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page