Free Printable Organic Chemistry

1.

What kind of organic reaction is shown below?

a)

Addition

b)

Elimination

c)

Substitution

d)

Rearrangement

2.

What type of organic reaction occurs when dihydroxyacetone phosphate is converted into its constitutional isomer glyceraldehyde 3-phosphate, a step in the glycolysis pathway by which carbohydrates are metabolized?

a)

Addition

b)

Elimination

c)

Substitution

d)

Rearrangement

3.

It refers to reactions that involve symmetrical bond-breaking and bond-making.

a)

radical reactions

b)

polar reactions

c)

non-radical reactions

d)

non-polar reactions

4.

Which occurs when one electron is donated to the new bond by each reactant?

a)

b)

c)

d)

5.

What step of radical reaction is shown in the image?

a)

initiation

b)

propagation

c)

termination

6.

In addition reaction, which will function as an electrophile?

a)

pi bond

b)

hydrogen in HCl

c)

chlorine in HCl

d)

–OH

7.

Which is a substitution reaction?

a)

b)

c)

8.

In a nucleophilic substitution reaction, which will function as a nucleophile?

a)

$CO_2$

b)

$Br^-$

c)

$SiH_4$

d)

$NH_3$

9.

What type of organic reaction is shown in the image?

a)

addition

b)

elimination

c)

substitution

d)

rearrangement

10.

Which is a propagation step for the free radical chlorination of methane?

a)

b)

c)

d)

11.

Name CH₃CH₂CH₃

a)

Ethane

b)

Ethyl

c)

Propane

d)

Propyl

12.

Which is a saturated aliphatic hydrocarbons?

a)

alkanes

b)

alkenes

c)

alkynes

d)

alkyls

13.

Which is 2-chloro-3-methyl-3-hexene?

a)

b)

c)

d)

14.

Name the compound $CH_3CH_2CH_2C≡CH$

a)

1-pentyne

b)

2-pentyne

c)

1-butyne

d)

2-butyne

15.

What is hybridization of carbon atoms in alkanes?

a)

sp

b)

$sp^2$

c)

$sp^3$

16.

Name the molecule with a formula of C₃H₈

a)

hexane

b)

propane

c)

butane

d)

ethane

17.

What is the correct IUPAC name of the compound shown in the image?

a)

1,4-dimethylcyclopentane

b)

1,3-dimethylcyclopentane

c)

2,5-dimethylcyclopentane

d)

2,3-dimethylcyclopentane

18.

Name the compound shown in the image.

a)

2,4-dimethylpentanoic acid

b)

1,1,3-trimethylbutanoic acid

c)

1-hydroxy-2,4-dimethylpentanone

d)

2-carboxyisohexane

19.

Name the compound shown in the image

a)

m-chlorobenzoic acid

b)

o-chlorobenzaldehyde

c)

p-chlorobenzoate

d)

m-chlorosalicylic acid

20.

What is the general formula for alkene?

a)

$C_nH_{2n}$

b)

$C_nH_{2n+2}$

c)

$C_nH_{2n-2}$

d)

$C_nH_{2n+1}$

21.

What is the relationship between the 2 compounds?

a)

conformers

b)

constitutional isomers

c)

diastereomers

d)

enantiomers

22.

What is the relationship between the two compounds (refer to the image)?

a)

conformers

b)

constitutional isomers

c)

diastereomers

d)

enantiomers

23.

It refers to stereoisomers without a stereocenter/ chiral center.

a)

cis-trans isomers

b)

enantiomers

c)

conformers

d)

diastereomers

24.

How many stereocenters are there in the compound shown in the picture?

a)

4

b)

5

c)

6

d)

7

25.

Which is a chiral molecule?

a)

b)

c)

d)

26.

What is the best description of the 2 compounds shown in the image?

a)

enantiomers

b)

diastereomers

c)

conformers

d)

same compound

27.

Determine the configuration of the compound shown in the image

a)

R

b)

S

28.

Determine the configuration of the compound shown in the image.

a)

R

b)

S

29.

In the structure (see image), how many stereoisomers?

a)

1

b)

2

c)

3

d)

4

30.

How many stereoisomers are there in 3-bromo-2-butanol?

a)

1

b)

2

c)

3

d)

4

31.

Who observed that when a beam of plane-polarized light passes through a solution of certain organic molecules, the plane of polarization is rotated?

(a)

32.

It is a non-steroidal anti-inflammatory drug in which one of its enantiomer is an active anti-inflammatory agent while the other enantiomer is a harmful liver toxin.

a)

Thalidomide

b)

Ibuprofen

c)

Naproxen

d)

L-Dopa

33.

Which is not a resonance structure of benzene?

a)

b)

c)

d)

34.

Which is an aromatic compound?

a)

b)

c)

35.

Which is anti-aromatic?

a)

b)

c)

d)

36.

Following the Huckel's rule, is the compound aromatic?

a)

yes

b)

no

37.

Which is non-aromatic?

a)

b)

c)

d)

38.

Name the aromatic compound shown in the image

(a)

39.

Name the aromatic compound shown in the picture

(a)

40.

Which of the following is true about benzene?

a)

Benzene is cyclic and non-conjugated.

b)

Benzene is nonplanar and has the shape of a regular hexagon.

c)

All bond angles are 120º and all carbon atoms are sp²-hybridized,

41.

It refers to compounds that contains an -OH (hydroxyl group) bonded to a tetrahedral carbon.

a)

alcohols

b)

ethers

c)

thiols

d)

alkyl halides

42.

Which best describes the compound shown in the image?

a)

symmetrical ether

b)

unsymmetrical ether

43.

It refers to organic molecules which contains a halogen atom X bonded to an sp3 hybridized carbon atom.

a)

alcohols

b)

ethers

c)

thiols

d)

alkyl halides

44.

Name the compound shown in the image

a)

1-tert-butyl-2-butanol

b)

5,5-dimethyl-3-hexanol

c)

2,2-dimethyl-4-hexanol

d)

1,1,1-trimethy-3-pentanol

45.

Which compound has the lowest boiling point?

a)

$CH_3CH_2CH_2CH_2CH_3$

b)

$CH_3CH_2CH_2CH_3$

c)

$CH_3CH_2CH_2CH_2CH_2OH$

46.

Which is an ether?

a)

b)

c)

d)

47.

It refers to compounds which has the type R3C-OH.

a)

primary

b)

secondary

c)

tertiary

d)

quaternary

48.

Which is most soluble in water?

a)

$CH_3CH_2CH_2OH$

b)

$CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3$

c)

$CH_3CH_2CH_3$

d)

$CH_3CH_2CH_2CH_3$

49.

Why do ethers do not form hydrogen bonds with other ether molecules despite being polar?

a)

ether molecules are so reactive that they never have an opportunity to form hydrogen bonds.

b)

the molecules are generally too large.

c)

there are too many hydrogen atoms on the molecules to bond with just one oxygen atom

d)

there is no hydrogen atom bonded to the oxygen.

50.

What is the major product of dehydration reaction in alcohol?

a)

ethers

b)

thiols

c)

alkyl halides

d)

alkene

Organic Chemistry

Total questions: 50

Worksheet time: 2hrs 40mins

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