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Chapter Quiz in Benzene

Total questions: 55

Worksheet time: 57mins

Name
Class
Date
1.

How many sigma bonds are present in benzene?

a)

4

b)

6

c)

8

d)

12

2.

What happens when benzene reacts with bromine in the presence of ferric bromide?

a)

it forms dibromo benzene

b)

forms mono bromo benzene

c)

both

d)

none

3.

Which of the following is a Heterocyclic aromatic compound?

a)

benzene

b)

Toluene

c)

Pyridine

d)

Xylene

4.

The bond length of C-C bond in benzene is:

a)

1.45 A

b)

1.40A

c)

1.33A

d)

1.23A

5.

Which one of the following does not contain any delocalised electrons?

a)

poly(propene)

b)

benzene

c)

graphite

d)

sodium

6.

Who discovered benzene?

a)

August Kekulé

b)

Michael Faraday

c)

Kathleen Lonsdale

d)

Dmitri Mendeleev

7.

The empirical formula of benzene is

a)

CH

b)

C2H4

c)

C6H6

d)

C6H12

8.

How many electrons are there in the delocalised pi electron system in benzene?

a)

3

b)

6

c)

9

d)

12

9.

Which of the following statements about benzene is incorrect?

a)

A total of six electrons per molecule are delocalised

b)

All of the carbon-carbon bonds are the same length

c)

The bond angles are all 120°

d)

The empirical formula is C6H6

10.

What form of reaction mechanism is benzene normally involved in?

a)

Electrophillic substitution

b)

Electrophillic addition

c)

Electophillic addition elimination

d)

Nucleophilic substitution

11.

The formula for the nitronium ion is

a)

NO2+

b)

NO2

c)

NO2+

d)

NO22+

12.

An electrophile is ...

a)

an electron pair donor

b)

an electron pair acceptor

c)

a negatively charged ion

d)

a proton donor

13.

Which statement about benzene is not true?

a)

It can be extracted from whale oil

b)

It is a planar, hexagonal molecule

c)

It is a relatively stable molecule because of the rings of delocalised electrons

d)

It can conduct electricity because of its delocalised electrons

14.

When cyclohexene is hydrogenated, the enthalpy change of hydrogenation is -120 kJ mol-1. The enthalpy of hydrogenation of benzene is ...

a)

-240 kJ mol-1

b)

-360 kJ mol-1

c)

-208 kJ mol-1

d)

-152 kJ mol-1

15.

Name the following compound

a)

Benzene

b)

Benzol

c)

Phenyl

d)

Phenol

16.

What is the IUPAC name of the compound?

a)

Nitro benzene

b)

Ammonia benzene

c)

Aniline

d)

amino benzene

17.

What is the Common name of the compound?

a)

Methyl benzene

b)

Toluene

c)

Benzene methane

d)

methane phenyl

18.

What is the name of the compound?

a)

Nitro benzene

b)

Trinitro benzene

c)

Trinitro toluene

19.

Which of the following pairs of compounds are not isomers?

a)
b)
c)
20.

All of the following react with benzene except:

a)

Water

b)

Nitric acid

c)

Bromine

d)

Sulfuric acid

e)

Methyl chloride

21.
What is the accepted current view of the model for bonding in benzene?
a)
Delocalised model
b)
Kekule structure
c)
Resonance structure
d)
Arrhenius structure
22.
What is true about C-C  bond lengths in benzene?
a)

It has alternative longer and shorter length.

b)

All have the same length.

c)

All have different length.

d)

Two are the same length and the third one is different.

23.
What is the C-C Bond angle in benzene?
a)
1200
b)
1200 & 109.50
c)
109.50
d)
104.50 & 1200
24.

What is the other name of aromatic hydrocarbons?

a)

Alkenes

b)

Alkynes

c)

Arenes

d)

Alkanes

25.

Predict the product G from the following reaction.

a)
b)
c)
d)
26.

Which functional groups are present in C6H5CONHCH3?

a)

carboxamide and benzene ring

b)

amine, benzene ring and carbonyl

c)

benzene ring and carbonyl

d)

amine and benzene ring

27.

What is produced when benzene reacts with chlorine in the presence of an iron catalyst?

a)

only chlorobenzene

b)

chlorobenzene and chlorine atoms

c)

chlorobenzene and hydrogen chloride

d)

chlorobenzene and water

28.

What organic product is formed when benzene reacts with nitric acid in the presence of concentrated sulfuric acid?

a)

a

b)

b

c)

c

d)

d

29.

What is the reagent (D) used in nitration reaction??

a)

KMnO4

b)

conc HNO3, Conc H2SO4

c)

conc HNO2, Conc H2SO4

d)

conc H2SO4

30.

What is the reagent (B) used in the reaction?

a)

CH3CH2Br, AlBr3

b)

CH3Cl, AlCl3

c)

CH3CH2Cl, FeCl3

d)

CH3CH(CH3), AlCl3

31.

What is the product (F) formed from the reaction?

a)
b)
c)
d)
32.

What did Kekulé suggest as a structure for benzene?

a)

A 3D cage of carbons with a complex system of bonds between them, with one hydrogen attached to each carbon

b)

A ring of six carbon atoms with a stable, delocalised system of s-electrons forming bonds between the carbons and the single hydrogen atom bonded to each carbon

c)

A long, long chain of carbons and hydrogens with alternating single and double bonds between the carbons

d)

A ring of six carbons with alternating single and double bonds between the carbons, with one hydrogen atom bonded to each carbon

33.

What is the IUPAC name for the following compound?

a)

3-chlorophenol

b)

3-hydroxychlorobenzene

c)

1-chloro-3-hydroxybenzene

d)

3-chloro-1-hydroxybenzene

34.

Which of the following statement is FALSE about the property of benzene molecule?

a)

It is a planar molecule.

b)

It is stabilised by delocalisation of ℼ electrons.

c)

Each carbon atom undergoes sp hybridisation.

d)

Its typical reaction is electrophilic substitution.

35.

Which of the following is FALSE about ethene and benzene?

a)

Both are planar molecules

b)

Both are non-polar molecules

c)

Both exhibit sp2 hybridisation

d)

Both have the same C:H ratio

36.

Which of the following reagent does not react with benzene?

a)

Concentrated H2SO4

b)

HNO3/ H2SO4

c)

Iodoethane in the presence of iron

d)

Sodium hydroxide solution

37.

Michael Faraday first isolated and identified benzene and he named it as:

a)

benzin

b)

bicarburet of hydrogen

c)

benzene

d)

carburet of hydrogen

38.

Mitscherlich produced benzin via the distillation of benzoic acid and:

a)

flaked lye

b)

limewater

c)

calcium oxide

d)

calcium carbonate

39.

This theory explains the bonding in benzene as a series of unhybridized p-orbitals which overlap forming a cloud of electron density above and below the molecule.

a)

Molecular orbital

b)

Resonance

c)

Molecular bond

d)

Valence bond

40.

Which of the following properties is not true for benzene?

a)

It has a higher melting point.

b)

It is dependent on the dipole moment.

c)

it is less dense than aromatics.

d)

It is generally insoluble in water.

41.

Which of the following is not a polycyclic aromatic hydrocarbon?

a)

Naphthalene

b)

pyridine

c)

Anthracene

d)

Phenanthrene

42.

It is a heterocyclic compound used as a common solvent in research and industry.

a)

anthracene

b)

phenanthrene

c)

naphthalene

d)

pyridine

43.

The benzene ring attachment is called benzyl group.

a)

True

b)

False

44.

Modern organic chemists use the word “conjugation” to describe how the electrons are delocalized (spread) across the whole molecule.

a)

True

b)

False

45.

The cyclic nature of benzene was finally confirmed by the eminent crystallographer Kathleen Lonsdale.

a)

True

b)

False

46.

Benzene is available abundantly in nature.

a)

True

b)

False

47.

Which of the following materials does not contain benzene?

a)

lacquers

b)

paints

c)

after-shave lotion

d)

cuticle remover

48.

Which of the following statements about the uses of benzene is NOT TRUE?

a)

It is used in the production of asphalt that is used by roofing and paving companies.

b)

It is used in the production of tires and rubber and it is found in adhesives that are used to glue soles to shoes.

c)

It keeps the paints in liquid form.

d)

Chronic exposure have several effects like headache, instability, convulsions, unconsciousness and irritations.

49.

Which of the following does not belong to the group?

a)

naphthalene

b)

anthracene

c)

pyridine

d)

phenanthrene

50.

Which of the following PAH's is used in the production of red dye alizarin and other dyes?

a)

naphthalene

b)

phenanthroline

c)

phenanthrene

d)

anthracene

51.

Which of the following is found to be present at high concentrations in PAH-contaminated surface soils, sediments, and waste sites?

a)

phennthroline

b)

anthracene

c)

phenanthrene

d)

pyrene

52.

Which of the following can cause skin rash, burning feeling, skin color changes, warts, and bronchitis?

a)

pyrene

b)

benzo(a)pyrene

c)

pyridine

d)

pyrazine

53.

Which of the following is used  as a solvent and to make many different products such as medicines, vitamins, food flavorings, pesticides, paints, dyes, rubber products, adhesives, and waterproofing for fabric?

a)

pyrazine

b)

pyridine

c)

pyrimidine

d)

purine

54.

These substances are found to have been used as a carrier for gene and drug delivery systems.

a)

porphine

b)

heme

c)

fullerene

d)

thiophene

55.

This heterocyclic compound is found among the alkaloids, a large class of alkaline organic nitrogen compounds produced by plants.

a)

imidazole

b)

furan

c)

pyrrole

d)

thiophene

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