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Single Correct Choice Type
- Which of the following would exhibit cis-trans isomerism? (A) CH 2 CH 2 CH = CH 2 (B) ClCH = CH – Cl (C) ClCH = CCl 2 (D) CH 2 = CH – COOH
- Which of the following compounds will show geometrical isomerism? (A) 2-pentyne (B) 2-pentene (C) 2-methylpropene (D) 2-methyl-2-butene
- Geometrical isomers are possible for (A) CH 3 CH 2 - C - CH 2 CH (^3)
NOH
(B) CH 3 CH 2 - C - CH 3
O
(C) CH 3 CH 2 - C - CH 3
N - OH
(D) C 6 H 5 - C - C 6 H 5
O
- Cis-trans isomerism is shown by:
(A) (B)
(C) (D)
- Which of the following will form geometrical isomers?
(A)
Cl
Cl
(B) CH 3 CH = NOH
(C) (D) All of these
- Which among the following compounds will show geometrical isomers? (A) CH 3 – CH = CH 2 (B) CH 3 - C = CH (^2)
CH 3 (C) CH 3 - C = CHD
CH 3
(D) CH 3 – CH = CHD
- How many stereo isomers are possible for the following molecule?
H 3 C
H 3 C CH - CH = CHCOOH
(A) 1 (B) 2
(C) 3 (D) 4
QUIZ FIITJEE ISOMERISM
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- What are the correct designations for the structure below?
Cl COOH
CH
(A) E, E (B) Z, E
(C) E, Z (D) No stereoisomerism is possible
- Assign double bond configuration to the following:
H 2 C - H 2 C CN
NC
CH 2 OH
COOH
(A) E (B) Z
(C) E, Z (D) Z, Z
- Which of the following does not have any geometrical isomers?
(A)
Cl
Cl Cl (B)
Cl Cl
Cl
(C)
Cl Cl
Cl
(D)
Cl
Cl
Cl
How many geometrical isomers are possible for the above compound? (A) 3 (B) 4 (C) 6 (D) 8
CH 3
CH 3
How many geometrical isomers are possible for the above compound? (A) 0 (B) 2 (C) 3 (D) 4
13. C
H
H
C = C =
H
H
Choose the correct relation between 1 & 2? (A) 1 = 2 (B) 1 > 2
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(C) (D)
2 2 2 3
HO CH CH F
Which conformer of above compound is most stable across C 2 C 3 (A) staggered (B) eclipsed (partially) (C) gauche (D) fully eclipsed
- Which is the lowest energy conformation of butane?
(A)
H (^) CH 3
H
H 3 C H
H H H
H
(B)
H (^) CH 3
H
H H
H H H
H 3 C
(C)
H (^) CH 3
H (^) CH 3
H
H
H
H H
H
H
H (D)
H (^) CH 3
H (^) H
H
H 3 C
H
H H
H
H
H
- Which of the following has least hindered rotation about carbon-carbon bond? (A) ethylene glycol (B) ethylene (C) acetylene (D) hexafluoroethane.
- How many structural isomers are possible with molecular formula C 4 H 10 O? (A) four (B) five (C) six (D) seven
Paragraph for Question Nos. 26 - 27
Read the paragraph carefully and answer the following questions: Conformational isomers are generated due to the free rotation about single bond. Due to torsional strain eclipsed form in less thermodynamically stable than staggered form. The gauche is specific conformer of staggered in which bulky groups are oriented closer to one another. Hence, generally gauche form is less stable than staggered form. But sometimes it is not true when hydrogen bonding is present
- The most stable conformer of 2-fluoro ethanol is
(A)
F
OH
H
H
H
H
(B)
F
H
H
OH
H
H
(C)
H
H H
H
H
H H
H OH
F
(D)
H
H H
H
H
H HF OH
- Which of the following conformer is optically active?
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(A)
CH (^3)
CH (^3)
D
H
H
D
(B)
CH (^3)
D
D
CH (^3)
H
H
(C)
CH 3 CH^3
H D H
D
(D)
CH 3
CH 3
H
H
H
H
Cl Cl
Br Br
Cl Cl
Br Br (A) (B) Relationship between above pair (A) & (B) is: (A) Enantiomer (B) Diastereomers (C) Identical (D) Structural isomer
- Total number of stereoisomer formed by the given compound is:
(A) 2 (B) 3
(C) 4 (D) 8
- The number of stereoisomers formed by the given compound is:
N
N
H
O
H 3 C
CH 3
O
H
(A) 2 (B) 3
(C) 4 (D) 8
- Which of the following structure represent meso-compound?
(A)
Me H Me
Me H
Me
(B)
O
H Br Br
H
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(A)
Cl
Br
(B)
Cl
Br
(C)
Cl Cl
(D)
Cl
Cl
- The number of enantiomers of the compound CH^3 - CH - CH - COOH
Br Br
is:
(A) 2 (B) 3
(C) 4 (D) 6
- How many atoms will be bisect during plane of symmetry? Cl
Cl (A) 2 (B) 4 (C) 6 (D) 8
N - OH
N N
R R
R (^) OH
HO
(A) Chiral (B) C 3 axis of symmetry (C) Optically active (D) All of these
- Which alkene will give meso as the only product with Br 2?
(A) C C
H 5 C (^6)
H H
C 6 H (^5) (B) C^ C
H
C 6 H 5 H
C 6 H (^5)
(C) C^ C
CH (^3)
C 2 H 5 C 3 H (^7)
CH 3 (D) C^ C
H
CH 3 H
CH 3
- Which of the following would exhibit cis-trans isomerism? (A) CH 2 CH 2 CH = CH 2 (B) ClCH = CH – Cl (C) ClCH = CCl 2 (D) CH 2 = CH – COOH
- Which of the following compounds will show geometrical isomerism? (A) 2-pentyne (B) 2-pentene (C) 2-methylpropene (D) 2-methyl-2-butene
- Geometrical isomers are possible for
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(A) CH 3 CH 2 - C - CH 2 CH 3
NOH
(B) CH 3 CH 2 - C - CH 3
O
(C) CH 3 CH 2 - C - CH 3
N - OH
(D) C 6 H 5 - C - C 6 H 5
O
- Cis-trans isomerism is shown by:
(A) (B)
(C) (D)
- Which of the following will form geometrical isomers?
(A)
Cl
Cl
(B) CH 3 CH = NOH
(C) (D) All of these
- Which among the following compounds will show geometrical isomers? (A) CH 3 – CH = CH 2 (B) CH 3 - C = CH (^2)
CH 3 (C) CH 3 - C = CHD
CH 3
(D) CH 3 – CH = CHD
- How many isomers are possible for the following molecule?
H 3 C
H 3 C CH - CH = CHCOOH
(A) 1 (B) 2
(C) 3 (D) 4
- What are the correct designations for the structure below?
Cl COOH
CH
(A) E, E (B) Z, E
(C) E, Z (D) No stereoisomerism is possible
- The functional isomer of ether is (A) alcohol (B) aldehyde (C) ketone (D) acid
- Which of the following compound displays optical isomerism?
