C HE M IS T R Y
DPP
DAILY PRACTICE PROBLEMS
ISOMERISM ST
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Single Correct :
1. Which of the following compound is a tautomer of 2-butanone?
OH
HO OH H H
(1) (2) (3) (4) All
H H
2. Which of the following compound has aromatic character in enol form?
O O O O
(1) (2) (3) (4)
NH
O O
3. Which of following shows correct order of % enol content ?
O O
O O O O
(1) O > (2) >
O
O O O
O
(3) > (4) >
4. Predict the correct relationship between given compounds:
OH
(I) (II) CHO (III) (IV)
O OH
(1) (I) and (II) are positional isomer
(2) (III) and (IV) are enol form of compound (I)
(3) (II) and [(III), (IV)] are tautomers
(4) (I) and (II) will give same enol forms.
5. Identify the compound having highest enol content ?
(1) (2) (3) OEt (4) EtO OEt
6. Which of the following compound can not show geometrical isomerism?
Me Me – CH2 F
(1) C = N – OH (2) C=C (3) (4) H – N = N – H
Et Et Cl
, 7. Tautomer of which compound can show geometrical isomerism?
O
O
(1) (2) (3) (4) N=O
O
8. Which compound is not capable to show geometrical isomerism?
Br CH3 Br OHC CN Cl CN
(1) (2) (3) (4)
Br T D HO NC Cl CN
Et Me
H SH HO H
9. & are related as :
H OH HS H
Me Et
(1) Enantiomer (2) Diastereomer (3) Structural isomer (4) Identical
10. What is the relationship between the structures below ?
Br CH3
C2H5 C2H5
C H C H
CH3 Br
(1) Structural isomers (2) Diastereomers
(3) Enantiomers (4) Same compound
Et CH3
F H H F
11. has optical rotation –45º, so optical rotation of will be
Cl H H Cl
CH3 Et
(1) +45º (2) 0º (3) –45º (4) Cannot be predicted
12. Consider the following structures (I), (II), (III) and (IV).
CH3 C2H5 Cl Cl
(I) Cl Br (II) Cl Br (III) H3C Br (IV) H5C2 CH3
C2H5 CH3 C2H5 Br
Which of the following statements is not correct ?
(1) II and III are identical (2) I and II are enantiomers
(3) I and II are enantiomers (4) II and IV are enantiomers
13. Determine the number of stereoisomers in the given compound
Cl
Br
(1) 2 (2) 4 (3) 8 (4) 16
14. Find the configuration of chiral carbon in the molecule.
CHO
HO CH2OH
H
(1) D, R (2) D, S (3) L, R (4) L, S
DPP
DAILY PRACTICE PROBLEMS
ISOMERISM ST
Join telegram channel- t.me/lokeshchat
Single Correct :
1. Which of the following compound is a tautomer of 2-butanone?
OH
HO OH H H
(1) (2) (3) (4) All
H H
2. Which of the following compound has aromatic character in enol form?
O O O O
(1) (2) (3) (4)
NH
O O
3. Which of following shows correct order of % enol content ?
O O
O O O O
(1) O > (2) >
O
O O O
O
(3) > (4) >
4. Predict the correct relationship between given compounds:
OH
(I) (II) CHO (III) (IV)
O OH
(1) (I) and (II) are positional isomer
(2) (III) and (IV) are enol form of compound (I)
(3) (II) and [(III), (IV)] are tautomers
(4) (I) and (II) will give same enol forms.
5. Identify the compound having highest enol content ?
(1) (2) (3) OEt (4) EtO OEt
6. Which of the following compound can not show geometrical isomerism?
Me Me – CH2 F
(1) C = N – OH (2) C=C (3) (4) H – N = N – H
Et Et Cl
, 7. Tautomer of which compound can show geometrical isomerism?
O
O
(1) (2) (3) (4) N=O
O
8. Which compound is not capable to show geometrical isomerism?
Br CH3 Br OHC CN Cl CN
(1) (2) (3) (4)
Br T D HO NC Cl CN
Et Me
H SH HO H
9. & are related as :
H OH HS H
Me Et
(1) Enantiomer (2) Diastereomer (3) Structural isomer (4) Identical
10. What is the relationship between the structures below ?
Br CH3
C2H5 C2H5
C H C H
CH3 Br
(1) Structural isomers (2) Diastereomers
(3) Enantiomers (4) Same compound
Et CH3
F H H F
11. has optical rotation –45º, so optical rotation of will be
Cl H H Cl
CH3 Et
(1) +45º (2) 0º (3) –45º (4) Cannot be predicted
12. Consider the following structures (I), (II), (III) and (IV).
CH3 C2H5 Cl Cl
(I) Cl Br (II) Cl Br (III) H3C Br (IV) H5C2 CH3
C2H5 CH3 C2H5 Br
Which of the following statements is not correct ?
(1) II and III are identical (2) I and II are enantiomers
(3) I and II are enantiomers (4) II and IV are enantiomers
13. Determine the number of stereoisomers in the given compound
Cl
Br
(1) 2 (2) 4 (3) 8 (4) 16
14. Find the configuration of chiral carbon in the molecule.
CHO
HO CH2OH
H
(1) D, R (2) D, S (3) L, R (4) L, S
