CHECK YOUR GRASP ISOMERISM EXERCISE-I

STRUCTURAL ISOMERISM 9. CH3—NH—C2H5 and (CH3)3N show which type of

isomerism
1. The term isomerism was given by :-
(1) Position (2) Functional
(1) Wholer (2) Hofmann
(3) Chain (4) None
(3) Bayer (4) Berzilius

10. Type of isomerism exists between :-

2. Which isomerism is present in n-butyl alcohol and
isobutyl alcohol :-
CH3—CH2—CH2—CN and CH3 CH CH3
(1) Position (2) Chain CN
(3) Optical (4) Geometrical
(1) Position (2) Chain
3. Diethylamine is a functional group isomer of :-
(3) Both the above (4) None of these
(1) Propyl cyanide
(2) Isopropyl isocyanide 11. Choose the group showing position isomerism :-
(3) 2-butanamine Cl O
(a) (b) CH2 CH CH3
(4) Ethylamine
OCH3
4. Esters are functional group isomers of :- OCH3
(a) Hydroxy aldehydes (b) Ketones (c) CH2 CH—CH2OH (d)
Cl
(c) Diketones (d) Alkanoic acid
(1) a, d (2) a, b O
(3) b, c (4) c, d (e) CH3 CH CH CH3

(1) b and e (2) b and c

5. Ethyl acetate is not a functional group isomer of
(1) 4–hydroxybutanone (2) 3–hydroxybutanal (3) a and d (4) a, b, c and e

(3) Butane–2,3–diol (4) Isobutyric acid

12. Diethyl ether is a metamer of :-

6. Which of the following molecular formula does not (1) 1–Butanol (2) 2–Butanol
show chain isomerism :- (3) 2–Methoxy propane (4) 1–Propanol
(1) C4H10 (2) C4H8 (3) C4H6 (4) C4H8O
13. How many isomeric pentynes (C5H8) are possible
7. The minimum number of carbon atoms present (1) 3 (2) 4
in an organic compound to be able to show position
(3) 5 (4) 6
isomerism is
(1) 3 (2) 4 (3) 2 (4) 5 14. Isomerism exhibited by acetic acid and methyl
formate is :
8. Alkenes with the molecular formula C4H8 do not
show :- (1) Functional (2) Chain
(1) Chain isomerism (3) Geometrical (4) Optical
(2) Geometrical isomerism
15. The total number of aldehydes and ketones with
(3) Position isomerism
the molecular formula C4H8O is -
(4) Optical isomerism
(1) 2 (2) 3
(3) 4 (4) 5
 23. Geometrical isomers are differ in :–
16. Urea H2N–C–NH2 molecule exhibits (isomerism):- (1) Position of functional group
O
(2) Position of atoms
(1) Chain (2) Position (3) Spatial arrangement of atoms
(3) Geometrical (4) Tautomerism (4) Length of carbon chain

17. BrCH2–CH2–CH=O and CH3–CH2– C=O are 24. Which of the following compounds will not show
Br cis-trans-isomerism ?
(1) (CH3)2CHCH=CHC2H5
(1) Functional isomers (2) Position isomers
(2) (CH3)2C=CHC2H5
(3) Chain isomers (4) Metamers
(3) CH3CH=CHCH3
18. The two compounds (4) C2H5CH=CHC2H5

O 25. Geometrical isomerism is possible for the compound

CH3–CH2 – C–CH2–CH2–CH3 and (1) Cl2C=CBr2 (2) ClBrC=CBrCl
(3) ClCH=CBr2 (4) (CH3)2C=CBrCl
O CH3
CH3–C – C–CH3 OPTICAL ISOMERISM
CH3
may be considered as : 26. Meso–tartaric acid is optically inactive due to the
presence of :-
(1) position isomers (2) metamers
(1) Molecular symmetry
(3) stereoisomers (4) tautomers
(2) Molecular asymmetry
19. The number of primary alcohols possible with the (3) External compensation
formula C4H10O is - (4) Two asymmetric carbon atoms
(1) 2 (2) 3 27. Which is optically active molecule :-
(3) 4 (4) 5
(1) C6H5 C OH (2) CH3 CH C2H5
20. The total number of benzene derivatives having the O OH
molecular formula C7H7Cl is -
(1) 2 (2) 3 (3) C6H5 CH OH (4) C6H5 CH CH3

(3) 4 (4) 5 H CH3

21. The total number of aldehydes having the molecular 28. The number of stereo isomers of D–glucose (a six
formula C5H10O is - carbon sugar) is :-
(1) 3 (2) 4 (1) 8 (2) 12
(3) 5 (4) 6 (3) 16 (4) 24
GEOMETRICAL ISOMERISM 29. Optically active isomers but not mirror images are
called -
22. The isomerism shown by Benzaldoxime (1) Enantiomers (2) Mesomers
(3) Tautomers (4) Diastereomers

CH=N–OH is :- 30. A compound can be divided into two equal halves

& contains even 'n' asymmetric carbon atoms. The
(1) Optical (2) Functional number of stereo isomer is -
(1) 2n (2) 2(n-1)
(3) Metamerism (4) Geometrical
(3) 2(n/2-1) (4) 2n-1 + 2(n/2-1)
31. Optical rotation of a racemic mixture is always - 36. Enantiomers have not identical

(1) Positive (2) Negative (1) tastes

(3) Zero (4) Can not be predicted (2) melting points

(3) smells
32. The total number of optically active isomer for
(4) medicinal (drug) properties
CH2OH(CHOH)3 CHO is -
37. Which of the following capital letters is chiral ?
(1) 2 (2) 4
(3) 8 (4) 12 (1) A (2) B
(3) Y (4) P

Et. 38. The minimum number of carbon atoms that must

be present in an alkane for it to have chirality is-
33. Me OH it has chiral centre (*). It is -
(1) 4 (2) 5
H
(3) 6 (4) 7

(1) R (2) S
39. The process of conversion of an optically pure
(3) Both (4) None enantiomer into an optically inactive equimolecular

34. The absolute configuration of the following mixture of (+) and (–) enantiomers is called -
compound is :– (1) tautomerization (2) isomerization
CH3 (3) epimerization (4) racemization

H Cl 40. The number of optically active isomers of the

2
compound
Cl H
3 CH3CHBrCHBrCOOH is -
C2H5 (1) zero (2) one
(1) 2S, 3R (2) 2S, 3S
(3) three (4) four
(3) 2R, 3S (4) 2R, 3R
41. In which of the following functional group isomerism
35. Which of the following structures has the is not possible :
R-configuration at the chiral centre ? (1) Alcohols (2) Aldehyde

CH3 H (3) Alkyl halides (4) Cyanides

(1) H OH (2) CH3 CH2CH3

COOH Br

OH OH
(3) CH3 H (4) H CH3
CH2CH3 CH2CH3

CHECK YOUR GRASP ANSWER KEY EXERCISE-I

Que. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Ans 4 2 3 1 3 3 3 4 2 2 3 3 1 1 2
Que. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Ans 4 1 2 1 3 2 4 3 2 2 1 2 3 4 4
Que. 31 32 33 34 35 36 37 38 39 40 41
Ans 3 3 2 2 4 4 4 4 4 4 3
BRAIN TEASERS ISOMERISM EXERCISE-II
1. A compound of molecular formula is C7H16 shows 8. The total number of ketones having the molecular
optical isomerism, compound will be :- formula C5H10O is -
(1) 2,3–dimethyl pentane (1) 2 (2) 3
(2) 2,2–dimethyl butane
(3) 4 (4) 5
(3) 2–methyl hexane
(4) None of the above H3C H
2. The geometrical isomerism is shown by C C H
CH2 9. H3C C Exhibits :-
CH2 H3C COOH
(1) (2)
(1) Tautomerism
CHCl
CHCl (2) Optical isomerism
(3) (4)
(3) Geometrical isomerism
3. Metamerism is shown by :– (4) Geometrical and optical isomerism
(1) Ethers (2) Ketones
(3) Tertiary amines (4) All the above 10. d and  enantiomer are differ in :-
4. C3H9N represents :- (1) Rotation of PPL
(1) A primary amine only
(2) Solubility in achiral solvent
(2) A secondary amine only
(3) Chemical properties
(3) A tertiary amine only
(4) Two primary, a secondary and a tertiary amine (4) Dipole Moment
5. The pair of structures represents :-
Me Me 11. Which of the following compounds does not exhibit
H Me H H tautomerism
(1) CH3NO2
(2) CH3CH2NO2
H H H H
(3) C6H5CH=CH–OH
Cl CH2Cl
(1) Enantiomers (2) Position isomers (4) CH3CH2OH
(3) Conformers (4) None 12. Which of the following molecules, each having the
6. The pair of metamers is :- molecular formula C4H8O, will have optical isomers
(1) C6H5 C NH CH3, (1) CH3COCH2CH3
(2) CH3CH2CH2CHO
O
(3) (CH3)2CHCHO
CH3 C NH C6H5
(4) CH2=CHCH(OH)CH3
O
(2) C2H5 C O C C2H5, 13. Identify R configuration :
O O
CH3 C O C C3H7 CH3 CN

O O
(3) Both the above (1) H CH2Cl (2) CH3 C CH
(4) None of the above
7. Which of the following will lead to maximum CH(CH3)2 CH2 OH
enolisation :–
(1) CH3COCH3 CHO COOH
(2) CH3COCH2CHO
(3) H OH (4) H2N H
(3) CH3 C CH C CH3
O Br O CH2 OH CH3
O
(4)
14. Which of the following has E-configuration : 22. The compound which may exhibit tautomerism is-
H3C CH
(1) C C 2 5
H H (1) OH NO (2) HN O
BrCH2 CH3
(2) C C
H3C C2H5 O
Br CH(CH3)2 (3) (4) All the above
(3) C C
HOCH2 CH2 CH3
CHO
Cl H
(4) C C 23. Which of the following compounds can exhibit
Br D
geometrical isomerism ?
15. The priority of groups OH, COOH, CHO, OCH3
attached to chiral carbon is in order - (1) 2–Pentyne (2) 2–Pentene
(3) 2–Methylpropene (4) 2–Methyl–2–butene
(1) OH > COOH > CHO > OCH3
24. The IUPAC name of the compound
(2) OCH3 > OH > CHO > COOH
(3) OCH3 > OH > COOH > CHO Cl CH2CH3
C=C is-
(4) OCH3 > COOH > CHO > OH H3C I
16. (+)-Tartaric acid and meso-tartaric acid are - (1) trans–2–chloro–3–iodo–2–pentene
(1) Enantiomers (2) Diastereomers (2) cis–2–chloro–3–iodo–2–pentene
(3) geometric isomers (4) None of these (3) trans–3–iodo–4–chloro–3–pentene
17. Tautomerism is not exhibited by :- (4) cis–3–iodo–4–chloro–3–pentene
25. The correct structure of trans–2–hexenal is -
(1) (2) (CH3)2CHNO2 CHO
(1)

(2)
CHO

(3) (4) (CH3)3CCHO (3) CHO

(4) CHO
18. Given compound exhibits x geometrical isomers and 26. How many alcohols (neglecting stereoisomers) are
y optical isomers possible with the molecular formula C5H12O
(1) 5 (2) 6
(3) 7 (4) 8
27. The total number of benzene derivatives having the
molecular formula C7H8O is -
The value of x and y respectively are :- (1) 3 (2) 4
(1) 4 and 4 (2) 2 and 2 (3) 5 (4) 6
(3) 2 and 4 (4) 4 and 2 28. The number of carbon atoms present in the smallest
acyclic hydrocarbon capable of showing cis-trans
19. The total number of cyclic compounds (neglecting isomerism is -
stereoisomers) with the molecular formula C 5H10
is - (1) 3 (2) 4
(3) 5 (4) 6
(1) 4 (2) 5
29. The total number of amines (neglecting
(3) 6 (4) 7 stereoisomers) possible with the molecular formula
20. Which of the following exhibits tautomerism ? C3H9N is-
(1) (CH3)2NH (2) (CH3)3CNO2 (1) 2 (2) 3
(3) 4 (4) 5
(3) R3CNO2 (4) RCH2NO2
21. The two compounds CH 3CH 2CH 2OCH 3 and 30. The total number of benzene derivatives with the
molecular formula C6H3Cl3 is -
CH3CH2OCH2CH3 may be considered as :
(1) metamers (2) tautomers (1) 2 (2) 3
(3) 4 (4) 5
(3) functional isomers (4) position isomers
31. A molecule is said to be chiral, only if 38. Consider the following structures (A), (B), (C)
(1) it is superimposable on its mirror image and (D) -
(2) it is non-superimposable on its mirror image
CH3 C2H5
(3) it possesses stereogenic centres
(4) it can have different configurations Cl Br Cl Br
32. Which of the following compounds is not chiral ? C2H5 CH3
(1) DCH2CH2CH2Cl (A) (B)
(2) CH3CHDCH2Cl
(3) CH3CHClCH2D Cl Cl
(4) CH3CH2CHDCl CH3 Br C2H5 CH3
33. The total number of stereoisomers of 2,3–
C2H5 Br
dibromobutane is -
(C) (D)
(1) 2 (2) 3
(3) 4 (4) 5 Which of the following statements is not correct
34. How many primary amines are possible with the (1) B and C are identical
molecular formula C4H11N (2) A and B are enantiomers
(1) 2 (2) 3 (3) A and C are enantiomers
(3) 4 (4) 5 (4) B and D are enantiomers
35. According to CIP Sequence rule, the correct 39. The interchange of two groups (Br and CH3) at the
arrangement in order of decreasing priority is - chiral centre of the projection formula (A) yields
(1) –OH > CH2OH > –CHO > –COOH the formula (B), while the interchange of another
(2) –OH > COOH > –CHO > –CH2OH set of two groups (C2H5 and Cl) of (A) yields the
(3) –COOH > OH > –CHO > –CH2OH projection formula (C) -
(4) –COOH > CHO > –CH2OH > –OH
CH3 Br CH3
36. In the structure
CH3 Cl Br Cl CH3 C2H5 Br
H OH C2H5 C2H5 Cl
H Br
(A) (B) (C)
CH3
Which of the following statements is not correct
the configurations at the chiral centres are
about the structures (A), (B) and (C) -
(1) 2R, 3R (2) 2S, 3R
(1) B and C are identical
(3) 2R, 3S (4) 2S, 3S
(2) A and C are enantiomers
37. Which of the following compounds contains a
(3) B and C are enantiomers
pseudo-asymmetric carbon atom
(4) A and B are enantiomers
(1) CH3CHCHCH2
Br Br Br 40. Which of the following compounds exists as a
nonresolvable racemic mixture ?
(2) CH3CH–CH–CHCH3 (1) CH3CH2CH(OH)CH2CH3
Br OH Br (2) CH3CHOHCOOH

(3) CH3CHCHCHCH3 (3) CH3CH2NHCH2CH3

OHBr Br CH3
+ –
(4) C2H5–N–CH(CH3)2Br
(4) CH3CHCHCHCH3
C2H5
Br OHCl
41. The process of separating a racemic mixture into 43. The correct configuration assigned for compounds
optically pure (+) and (–) enantiomers is known as- (I) and (II) respectively are :-

(1) mutarotation (2) epimerization

COOH HO CH3
(3) asymmetric synthesis (4) resolution
42. How many meso isomers are possible for C
H OH Br
2, 3, 4-pentanetriol - CH2CH3
CH3
(1) 1 (2) 2 (I) (II)
(3) 3 (4) none of these
(1) R, R (2) S, S
(3) R, S (4) S, R

BRAIN TEASERS ANSWER KEY EXERCISE-II

Q u e. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
A ns 1 4 4 4 2 3 4 2 2 1 4 4 3 2 3
Q u e. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
A ns 2 4 2 2 4 1 4 2 1 2 4 3 2 3 2
Q u e. 31 32 33 34 35 36 37 38 39 40 41 42 43
A ns 2 1 2 3 2 2 2 4 3 2 4 2 1
PREVIOUS YEAR QUESTIONS ISOMERISM EXERCISE-III

1. The enolic form of acetone contains [IIT-90] 8. The number of possible enantiomeric pairs that
(1) 9 bonds, 1 bond and 2 lone pairs can be produced during monochlorination of
(2) 8 bonds, 2 bonds and 2 lone pairs 2–methyl butane is – [IIT-97]
(3) 10 bonds, 1 bonds and 1 lone pair (1) 2 (2) 3 (3) 4 (4) 1
(4) 9 bonds, 2 bond and 1 lone pair
9. Tautomerism is not exhibited by– [IIT-98]

2. An organic molecule necessarity shows optical

activitiy if it – [IIT-93] (1) CH=CH–OH(2) O O
(1) Contains asymmetric carbon atoms
(2) is non polar
(3) is non superimposable on its mirror image O
(3) (4) O
(4) is superimposable on its mirror image
O
O
3. The compound which is not isomeric with diethyl
10. Rotation of polarised light can be measured by–
ether is – [IIT-93]
[IIT-98]
(1) butan–1–ol
(1) Monometer (2) Galvanometer
(2) butanone
(3) Polarimeter (4) Viscometer
(3) 2–methyl propan–2–ol
(4) n–propyl methyl ether 11. The optically active tartaric acid is named as
D–(+) tartaric acid because it has a positive –
4. Ordinary light can be converted into plane polarized
[IIT-99]
light with the help of a– [IIT-93]
(1) optical rotation and is derived from D–glucose
(1) Nickel prism (2) Nicol prism
(3) Diffraction grating (4) Quartz cell (2) pH in an organic solvent
(3) optical rotation and is derived from
5. The structure shows : [IIT-95]
D–(+)– glyceraldehyde
H3C H
C=C H (4) optical rotation only when substituted by
H3C C deuterium
COOH
CH3 12. Which of the following compound will exhibits
(1) Geometrical isomerism geometrical isomerism–
(2) Optical isomerism (1) 1–phenyl–2–butene [IIT-2000]
(3) Geometrical & optical isomerism (2) 3–phenyl–1–butene
(4) tautomerism
(3) 2–phenyl–1–butene
6. How many optically active stereoisomers are (4) 1, 1–diphenyl–1–propene
possible for butane –2,3–diol – [IIT-97] 13. The number of isomers for the compound with
(1) 1 (2) 2 molecular formula C2BrCIFI is– [IIT-2000]
(3) 3 (4) 4 (1) 3 (2) 4 (3) 5 (4) 6
14. Which of the following exhibits stereoisomerism–
7. Isomers which can be interconverted through
(1) 2–Methylbutene–1 [IIT-2000]
rotation around of single bond are -
[IIT-97] (2) 3–Methylbutyne–1
(1) Conformers (2) Diastereomers (3) 3–Methylbutanoic acid
(3) Enantiomers (4) Positional isomers (4) 2–Methylbutanoic acid
15. Hydrogenation of the following compound in the
20. Among the following four structures I to IV
presence of poisoned palladium catalyst gives – [AIEEE-2003]
[IIT-2002] C2H5 CH C3H7 C2H5 C CH C2H5

Me H Me CH3 O CH3
(I) (II)
H H
Me H + C2H5 CH C2H5
H C
CH3
H
(IV)
(1) optically active compound (III)

(2) an optically inactive compound It is true that-

(1) All four are chiral compounds
(3) a racemic mixture
(2) only I and II are chiral compounds
(4) a diastereomeric mixture (3) only III is a chiral compound
(4) only II and IV are chiral compounds
16. Which of the following has the lowest dipole
21. If C2 in below compound is rotated by 120º angle
moment – in anticlockwise direction along C2–C3, which of
[IIT-2002] the following form will be produced –
[IIT-2004]
CH3 CH3 1
(1) C=C (2) CH3–CC–CH3 CH3
H H H H

(3) CH3CH2CCH (4) CH2=CH–CCH 2

3

17. Recemic mixture is formed by mixing two- H H

CH3
(1) isomeric compounds [AIEEE-2002] 4
(2) chiral compounds
(1) Partial staggered (2) Perfectly eclipsed
(3) meso compounds (3) Perfectly staggered (4) Gauche conformation
(4) enantiomers with chiral carbon
22. Which of the following will have a meso-isomer also-
18. Geometrical isomerism is not shown by- (1) 2–chlorobutane [AIEEE-2004]
(1) 1,1–dichloro–1–pentene [AIEEE-2002] (2) 2,3–dichlorobutane
(2) 1,2–dichloro–1–pentene (3) 2,3–dichloropentene
(4) 2–hydroxy propanoic acid
(3) 1,3–dichloro–2–pentene
(4) 1,4–dichloro–2–pentene 23. Amongst the following compounds, the optically
active alkane having lowest molecular mass is
19. Following types of compounds I and II
(1) CH3 CH2 C CH [AIEEE-2004]
CH3
(I) CH3CH=CHCH3 [AIEEE-2002]
(2) CH3 CH2 CH CH3
(II) CH3 CH OH, are studied

CH2CH3 H

(3) CH3 C
in terms of isomerism in-
C2H5
(1) chain isomerism (2) position isomerism
(3) conformers (4) stereo isomerism (4) CH3 CH2 CH2 CH3
24. Which of following compounds is not chiral 30. The number of stereoisomers obtained by
(1) 1–chloropentane [AIEEE-2005] bromination of trans–2–butene is– [IIT-2007]
(2) 2–chloropentane (1) 1 (2) 2
(3) 1–chloro–2–methyl pentane (3) 3 (4) 4
31. Which one of the following conformations of
(4) 3–chloro–2–methyl pentane
cyclohexane is chiral ? [AIEEE - 2007]
(1) Twist boat (2) Rigid
25. Of the five isomeric hexanes, the isomer which can
give two monochlorinated compounds is- (3) Chair (4) Boat
32. Which of the following molecules is expected to
(1) 2-methyl pentane [AIEEE-2005]
rotated the plane of plane-polarised light ?
(2) 2,2–dimethyl butane [AIEEE - 2007]

(3) 2,3–dimethyl butane CHO

(4) n-hexane HO H
(1) (2)
SH
CH2OH

26. Which types of isomerism is shown by 2,3–dichloro

butane- [AIEEE-2005] COOH
H2N NH 2
(1) structural (2) geometric (3) H H (4) H2N H
Ph Ph
(3) optical (4) diastereo
H

CH3
Cl2/hv
27. CH3–CH–CH2–CH3 N (no. of isomers) HOC
2 CO2H
33. The absolute configuration of
HO H H OH
Fractional distillation
  (F), (N) and (F) are–
[IIT-2006] is [AIEEE - 2008]
(1) S, S (2) R, R
(1) 6, 4 (2) 4, 4
(3) R, S (4) S, R
(3) 6, 6 (4) 3, 3
34.   D      glu cos e and   D      glu cos e
28. Increasing order of stability among the three main
are [AIEEE - 2008]
conformations (i.e. Eclipse, Anti, Gauche) of
2-fluoroethanol is [AIEEE-2006] (1) conformers (2) epimers

(1) Gauche, Eclipse, Anti (3) anomers (4) enantiomers

(2) Eclipse, Anti, Gauche 35. The alkene that exhibits geometrical isomerism
is :- [AIEEE - 2009]
(3) Anti, Gauche, Eclipse
(1) 2–butene (2) 2–methyl–2–butene
(4) Eclipse, Gauche, Anti (3) Propene (4) 2–methyl propene

29. The number of structural isomers C6H14 is– 36. The number of stereoisomers possible for a
(1) 3 (2) 4 [IIT-2007] compound of the molecular formula

(3) 5 (4) 6 CH3–CH=CH–CH(OH)–Me is:-[AIEEE - 2009]

(1) 4 (2) 6

(3) 3 (4) 2
37. The correct statement(s) about the compound given 39. Out of the following, the alkene that exhibits optical
below is (are) :- [IIT-2008] isomerism is :- [AIEEE-2010]

Cl H (1) 2-methyl-2-pentene (2) 3-methyl-2-pentene

H3C CH3

Cl H
(3) 4-methyl-1-pentene (4) 3-methyl-1-pentene
40. Identify the compound that exhibits
(1) The compound is optically active tautomerism :- [AIEEE-2011]
(2) The compound possesses centre of symmetry (1) 2-Pentanone (2) Phenol
(3) 2-Butene (4) Lactic acid
(3) The compound possesses plane of symmetry
41. How many chiral compounds are possible on
(4) The compound possesses axis of symmetry
monochlorination of 2–methyl butane ?[AIEEE-2012]
38. The correct statement(s) concerning the structures (1) 6 (2) 8 (3) 2 (4) 4
E, F and G is (are) [IIT-2008] 42. Which branched chain isomer of the hydrocarbon
with molecular mass 72 u gives only one isomer of
H3C O mono substituted alkyl halide ? [AIEEE-2012]
(1) Neohexane (2) Tertiary butyl chloride
H3C CH3
(3) Neopentane (4) Isohexane
(E)
43. How many cyclic structures are possible for
OH C4H6 :- [AIEEE-2012(Online)]
H3C
(1) 3 (2) 5 (3) 4 (4) 6
H3C CH3
(F) 44. Maleic acid and fumaric acids are :-
(1) Tautomers [AIEEE-2012(Online)]
H3C CH3 (2) Chain isomers
H3C OH (3) Geometrical isomers
(G) (4) Functional isomers
(1) E, F and G are resonance structures
(2) E, F and E, G are tautomers
(3) F and G are geometrical isomers
(4) F and G are diastereomers

PREVIOUS YEAR QUESTIONS ANSWER KEY EXERCISE-III

Que. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Ans 1 3 2 2 2 2 1 1 2 3 3 1 4 4 2
Que. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Ans 2 4 1 4 2 1 2 3 1 3 3 1 2 3 1
Que. 31 32 33 34 35 36 37 38 39 40 41 42 43 44
Ans 1 1 2 3 1 1 1, 4 2,3,4, 4 1 4 3 3 3