Question bank of optical isomerism

( ~ • '-·
Cl-13
Q.1 Which of the following compounds can exhibit
optical isomerism - 1-1-t--01-1
CJ-1 3-t-01-1
(I) CH3> C<H
CH3 COOH 1-1
(I) 2S, 3S (2) 2S, 3R
2 CH3> <H (3) 2R, 3S (4) 2R, 3R
( ) C H C COOH
2 5

CI--13> <CH 1 Q.6 Which of the following is not chiral -
3
( ) CH C COOH
3 (I) 2-Butanol

(4) - C
HO -
H> <H
COOH
(2) 2,3-Dibromo pentane

Which of the following pairs of compounds are (3) 3-Bromo pentane
Q.2
enantiomers - (4) 2-Hydroxy propanoic acid
CH3 Cf-13

H--+--OH and H0--+--1--1 Q.7 Among the following L-serine is -
(I) HO-t--H 1--1-t---01--1
CO,H
CH3 CH3
CH3 {2)HOH,C+H
H--+--OH and HO~H
(2)Ho-t--H HO-t--H NH1

CH3 Cl-13
CH3 CH 3
H--+--Ol-1 and 1--1--+--0H
3
( ) HO-t--H 1-1-t---01-1
CH3 CH3
CH3 Q.8 Among the following which one can have a meso
"form -
(4)Hi=r;~H and 1--10--t--H
1-1o-f-1-1 (I)
(2)
Cl-13Cl-l(OH)CH(Cl)C 2 H5
CH 3CH(OH)CH(OH)CH3
CH3 Cl-13 (3) C2 H5CH(OH)CH(OH)CH 3
Q.3 The configuration of the given compound is - (4) HOCH 2CH(Cl)CH 3

Br Q.9 Cl-13-CI-ICI-CHrCH 3 has a chiral centre which one
I of the following represents its R configuration -
C ··• H
/
HC
3
\Cl · C, 1-1;
1 -
C,H)-
I -


( 1) H-C-CH3 (2) Cl__:_C-CH,
(I) E (2)R (})S . I , ·- I - J


Cl 1-1
Q.4 The absolute configuration of the following
compound is - CH-
I J
Cf-1 3 (J) 1-1- C-C I
1-1--t--c1 I
C2 l-l s
c 1-t--1-1
C21-1 5 Q.10 How many stereo isomer does this molecule have
(I) 2S, 3R (2) 2S, 3S CH1CH=C HCl-l 2CI-IBrCH3
(3)2R,3S (4)2R,JR
Q.5 Co rrect configuration of th e following is - (I) 8 (2) 2
(J) 4 (4) 6
1 I P, a ge

,\'½o \ ,'/:~
----~--- --- - ~ ~ - ~ ~
, (). ~
/

;11,·
(J):c1~3-Cl➔2-CH-CH 3 , . ·
I : l
Br
(4) All the above
'"
0




/',
·,.·: '., .. . '..
; t,, , : ·
Q.55
:·;i , CHO
· •"·
HO
t'f-1 01-1
2
.I ·'



HCN. . ~IOtH
H ~ HO
.,CN


H + J-1O
'J-1 201-1
Ht· CN ·. ;



'H20H
OH
1-1



optical If
rotation produced by
· - - --EompouncH-and 11 are
(I)-:. Diastereomers (2) Identical
\ + 36° th~n (J.) · Mesomers (4) Enantiomers
that produced by




r
Q.56 The number of stereo isomers possible for
the compound with the structure is -
OH
I
CH CH =CH-CH= CH-CH,CH-CHJ
3
(I) 2 (2) 4 (3) 6 (4) 8
(1)-36° (2) 0°
(3) + 36° (4) Unpredictable Q.57 How many optically active isomers are possible for a

compound of given formula -
Q.50 Number of optically active. isomers of tartaric acid is
CHpH. CHOH. CHOH. CHOH. CHpH
CH(OH)COOH (1)2 (2)3
I
CH(OH)COOH (3)4 (4)8
(1)2 (2)3 (3)4 (4)5
Cl
Q.51 The process of separation of racemic modifications
into d and eenantiomer is called- Q.58 Thecompound ~ H 1s
.// ye,
(!) Resolution H
(2) Dehydration
(I) cis -1 ,2- dichlorohexane
(3) Revolution
(2) cis-1 ,2-dichlorocyclohexane
(4) Dehydrohalogenation
(3) trans- 1,2-dichlorohexane
Q.52 Molecular formulae of an optically active organic (4) trans -1,2-dichlorocyclohexane
compound is C4H10O. Its structure is Q.59 Which is optically inactive compound -
(I) C2HpC2H5 Me Me
(2) CH,QC 3H7
(a)
(3) CH 3CH 2CH 2CH 2OH
(4) CH 3CHOHCH 2CH 3 Me COOH NO2 Me




Q.53 CompoundH
/c,
COOH
I
I ''NH 2 is-
(b)M:*,
CH J OH
(I) D-form (2) L-form
(c) F)c=C)3r
(4) Z-form
Q.54
(3) R-fom1
Cl \I
The JUPAC name of the given compound is

~
Br · / CHO
(d)
CO) ~


MexxxBr
Cl
(I) (2R, 4Z) -4-bromo-2-chloro-2-methyl-4-hexenal (2)
(2R, 4E) -4-bromo-2-chloro-2-methyl-4-hexenal
(e)
(3) (2Z, SR)-3-bromo-5-chloro-5-formyl-2-hexene
(4) (2S, 4E)-4-bromo-2-chloro-2-methyl-4-hexenal Br Me
(I) b, c, cl (2) a, b, d, e

(3)a, b, c, d (4)Onlye


SI P ag e