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Stereochemistry

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.
a)

I, II, III, and IV

b)

I, II

c)

III, IV

d)

IV, V

e)

None of the structures

2.
a)

I, II, III, IV, and V

b)

I, II, III, and IV

c)

I and II

d)

III and IV

e)

IV alone

3.
a)

A

b)

B

c)

C

d)

D

e)

E

4.
a)

I and II

b)

IV and V

c)

II and III

d)

I, II, and III

e)

None of the above options

5.
a)

constitutional isomers

b)

enantiomers

c)

diastereomers

d)

identical

e)

none of these

6.
a)

A

b)

B

c)

C

d)

D

e)

E

7.
a)

constitutional isomers

b)

enantiomers

c)

diastereomers

d)

identical

e)

none of the above

8.

Hint, think about how you could rotate/change substituent locations without changing the stereochemistry (ex. change 3, rotate 180 degrees, etc.)

a)

I

b)

II

c)

III

d)

more than one

e)

none of the above

9.
a)

II

b)

II and III

c)

II and IV

d)

III and V

e)

IV and V

10.
a)

2R, 4S

b)

2S, 4R

c)

2R, 4R

d)

2S, 4S

e)

R and S cannot be applied

11.

Enantiomers are

(a)  

12.

Number of stereoisomers of camphor is

a)

2

b)

3

c)

4

d)

1

13.

The correct statement about optical activity is

a)

a molecule having two or more chiral centers is always optically active

b)

a molecule having just one chiral center is always optically active

c)

a molecule having alternating axis of symmetry is optically inactive is always optically active

d)

an optically active molecule should have atleast one chiral center

14.
a)

I

b)

II

c)

III

d)

It does not have an enantiomer

e)

Both II and III

15.
a)

I

b)

II

c)

III

d)

IV

e)

V

16.
a)

constitutional isomers

b)

enantiomers

c)

diastereomers

d)

identical

e)

none of these

17.

Assign the configuration of the below two structures

a)

S,S

b)

S,R

c)

R,S

d)

R,R,

18.

Which one of the following is optically active

a)

d

b)

a

c)

b

d)

c

19.

Optical isomers are of how many types

a)

2

b)

3

c)

4

d)

5

20.

Dioastereomers are

a)

superimposable mirror images

b)

non superimposable mirror images

c)

have no relation with each other

d)

none of these are correct

21.

Position isomers are

a)

Structural isomers

b)

stereoisomers

c)

optical isomers

d)

none of the above

22.

cius isomer contains the like group in the

a)

opposite side

b)

same side

c)

either same or opposite

d)

neither same nor opposite

23.

What is main condition for optical activity

(a)  

24.

The given compounds 1 and 2 are

a)

Identical

b)

Diastereomers

c)

Enantiomers

d)

Constitutional isomers

25.

The absolute configuration of L glyceraldehyde is

a)

S

b)

R

26.

The absolute configuration at the 2 chiral centres in D- Ribulose is

a)

3S4S

b)

2S3S

c)

2R3R

d)

3R4R

27.

The maximum number of stereoisomers possible for 4-phenyl but-3-en-2ol is

a)

1

b)

2

c)

3

d)

4

28.

The following structures are

a)

identical,enantiomeric,diastereomeric, structural isomers

b)

enantiomeric, identical,structural isomers, diastereomeric

c)

enantiomeric, identical,diastereomeric, structural isomers

d)

diastereomeric, identical,structural isomers, enantiomeric

29.

A racemic mixture is optically active.

a)

yes

b)

no

30.

Determine if the following molecules are optically active (chiral) or optically inactive (achiral)

(a)  

31.

Determine if the following molecule is optically active (chiral) or optically inactive (achiral)

(a)  

32.

Determine if the following molecule is optically active (chiral) or optically inactive (achiral)

(a)  

33.

Determine if the following molecule is optically active (chiral) or optically inactive (achiral)

(a)  

34.

Determine if the following molecule is optically active (chiral) or optically inactive (achiral)

(a)  

35.

Which of the substituents are ranked as the highest priority based on Cahn-Ingold-Prelog ranking rules?

a)

-OH

b)

-CH2CH3

c)

-H2PO4

36.

Which of the substituents are ranked as the lowest based Cahn-Ingold-Prelog ranking rules?

a)

-NH2

b)

-C≡N

c)

-NO2

37.

Which of the substituents are ranked as the lowest based Cahn-Ingold-Prelog ranking rules?

a)

-NH2

b)

-C≡N

c)

-NO2

38.

Which of the substituents are ranked as the highest priority based on Cahn-Ingold-Prelog ranking rules?

a)

-C≡CH

b)

-CH2CH3

c)

-CH(CH3)2

39.

Which of the substituents are ranked as the lowest priority based on Cahn-Ingold-Prelog ranking rules?

a)

-C(O)H

b)

-CH2OH

c)

-CH2-O-C(O)CH3

40.

How many chiral carbon in the following molecule?

a)

1

b)

2

c)

3

d)

4

41.

Give the correct absolute configuration on the labelled chiral carbon in 2-iodobutane

a)

S

b)

R

c)

cis

d)

trans

42.

Give the correct absolute configuration of this molecule

a)

(1R, 2S)-2-isopropylcyclohexanol

b)

(1R,2R)-2-isopropylcyclohexanol

c)

(1S,2R)-2-isopropylcyclohexanol

d)

(1S,2S)-2-isopropylcyclohexanol

43.

Give the correct absolute configuration on the labelled chiral carbon in 2-methylbutanal

a)

cis

b)

S

c)

trans

d)

R

44.

Give the absolute configuration on the labelled chiral carbon in 2,N,N-trimethyl-3-hexanamine

a)

S

b)

R

c)

trans

d)

cis

45.

What property can be assigned to a carbon atom that has four different atoms or structural groups attached to it?

a)

isomerity

b)

chirality

c)

chivalry

d)

geometry

46.
How many chiral center is found in C2H5CH(OH)CH2OH?
a)
1
b)
2
c)
3
d)
4
47.

Can this compound can form optical isomers?

a)

No

b)

yes

c)

depends on whether it wants to or not

48.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

49.

The optical isomer of this compound is

a)
b)
c)
50.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

51.

Optcial isomers have:

a)

polarised light

b)

non-superimposable mirror images

c)

mirror images

d)

superimposable mirror images

52.

Optical isomers

a)

reflect polarised light in opposite directions

b)

rotate polarised light in opposite directions

c)

reflect plane polarised light in opposite directions

d)

rotate plane polarised light in opposite directions

53.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

54.

Butanoic acid is:

a)

Optically active

b)

Non-optically active

c)

Basic

55.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

56.

How many chiral carbons are present and where?

a)

2 chiral carbons - carbon 3 and 2

b)

1 chiral carbon - carbon 3

c)

1 chiral carbon - carbon 5

d)

no chiral carbons

57.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

58.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

59.

2-methylbutanoic acid is:

a)

Optically active

b)

Non-optically active

c)

Basic

60.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

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