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Benzene and Aromatics Lesson

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.
a)

60 ℃

b)

55 ℃

c)

Heated

d)

Cold diluted

2.
What is the molecular formula of Benzene?
a)
C6H12
b)
C6H6
c)
C6H10
d)
C8H8
3.

What is reagent D used in nitration reaction??

a)

KMnO4

b)

conc HNO3, Conc H2SO4

c)

conc HNO2, Conc H2SO4

d)

conc H2SO4

4.

What is reagent B?

a)

CH3CH2Cl, AlCl3

b)

CH3Cl, AlCl3

c)

CH3CH2Cl, FeCl3

d)

CH3Cl, FeCl3

5.

What catalyst is required for halogenation of Benzene?

a)

CH3Cl

b)

CH3CH2Cl

c)

Halogen carrier

d)

Hydrogen carrier

6.

What is the product F?

a)
b)
c)
d)
7.

What is product G?

a)
b)
c)
d)
8.

How many delocalised electrons are there for each benzene molecule?

a)

2

b)

3

c)

6

d)

12

9.

Name the following compound

a)

Benzene

b)

Benzol

c)

Phenyl

d)

Phenol

10.

Name the compound

a)

Nitrobenzene

b)

Phenylamine

c)

Aniline

d)

Aminobenzene

11.

Name the compound

a)

Methanebenzene

b)

Methylbenzene

c)

Benzenemethane

d)

Methanephenyl

12.

Name the following

a)

2-Methyl-1,3,5-trinitrobenzene

b)

2,4,6-trinitromethylphenyl

c)

2-Methyl-1,3,5-trinitrophenyl

d)

2,4,6-trinitromethylbenzene

13.

For benzene; which of the statement is NOT correct?

a)

It is an aromatic compound.

b)

Its empirical formula is CH.

c)

Its molecular formula is C6H5.

d)

It has a resonance hybrid structure.

14.

All of the following react with benzene except:

a)

Water

b)

Acyl chloride

c)

Chloroethane

d)

Bromine

15.

Which of the compound is NOT aromatic?

a)
b)
c)
16.

Which of the following is correct for the benzene

molecule?

a)

It contains 12 hydrogen atoms.

b)

It is unsaturated.

c)

The carbon-carbon bonds are single.

d)

The bond lengths are not equal.

17.

Does benzene decolorise bromine?

a)

Yes

b)

No

c)

Who knows

d)

Why did i take chemistry in the first place?

18.

Which of the following pairs of compounds are isomers? You can choose more than one option if necessary.

a)
b)
c)
d)

ALL of the pairs shown are not isomers.

19.

Benzene is ......

a)

trigonal planar

b)

tetrahedral

c)

planar

d)

trigonal pyramidal

20.
What is true about C-C  bond lengths in benzene?
a)
alternative longer and shorter length
b)
All the same length 
c)
All different length
d)
two are the same length and the third one is different
21.
What is the C-C Bond angle in benzene?
a)
1200
b)
1200 & 109.50
c)
109.50
d)
104.50 & 1200
22.
Which mechanism an aromatic compounds react by?
a)
Electrophilic addition
b)
Electrophilic substitution
c)
Nucleophilic addition
d)
Nucleophilic substitution
23.

What is the other name of aromatic hydrocarbons?

a)

Alkenes

b)

Alkynes

c)

Arenes

d)

Alkanes

24.

Identify the product for the following reaction (P) ?

a)
b)
c)
d)
25.

Identify the product for the following reaction (Q) ?

a)
b)
c)
d)
26.

Identify the product for the following reaction (R) ?

a)
b)
c)
d)
27.
Which of these are  not evidence for the delocalised model?
a)
X-ray crystallography shows all bonds are same length
b)
Benzene is resistant to bromination
c)
Enthalpy of hydrogenation shows it is less than expected
d)
Enthalpy of hydrogenation shows it is  more than expected
28.
What is the resonance energy of Benzene?
a)
151 KJ mol-1
b)
152 KJ mol-1
c)
153 KJ mol-1
d)
154 KJ mol-1
29.
What is the C-C bond length in Benzene?
a)
0.137 nm
b)
0.138 nm
c)
0.139 nm
d)
0.140 nm
30.

What is the IUPAC name for the following compound?

a)

3-bromo-4-nitrobenzoic acid

b)

2-nitro-6-carboxybromobenzene

c)

2-bromo-1-nitro-4-benzoic acid

d)

2-bromo-4-carboxynitrobenzen

31.

What is the IUPAC name of the following compound?

a)

2,4-dibromohydroxybenzene

b)

2,4-dibromotoluene

c)

2,4-dibromophenol

d)

4,6-dibromophenol

32.

The history of the chemical benzene is rather interesting in that it proved devilishly difficult to ascertain its structure. What was the name of the scientist who came up with the first plausible arrangement of benzene?

a)

Van der Waals

b)

Kekulé

c)

De Broglie

d)

Planck

33.

Benzene, also known as benzol, is a chemical that is known as a planar hexagonal ring and it consists of two different types of atom. Apart from carbon, which of the following elements is a constituent of benzene?

a)

Helium

b)

Lithium

c)

Hydrogen

d)

Argon

34.

Benzene, instead of undergoing electrophilic addition reactions that would reduce its stability, is involved in electrophilic substitution reactions. One product of a substitution reaction involving benzene is 2,4,6-trinitromethylbenzene. By what name is this molecule more commonly known?

a)

Methane

b)

TNT

c)

Ozone

d)

Aspirin

35.

When a molecule of benzene partakes in an electrophilic substitution reaction a derivative of formula -C6H5 exists. Therefore, in a monosubstituted molecule of benzene, what is the name given to -C6H5?

a)

Carboxyl Group

b)

Methyl Group

c)

Phenyl Group

d)

Hydroxyl Group

36.

Due to benzene having a cloud of delocalised electrons, the molecule is more stable. This stability generated by delocalisation is known as what type of energy?

a)

Kinetic

b)

Ionisation

c)

Potential

d)

Resonance

37.

An example of the electrophilic substitution reactions of benzene is halogenation. Which of the following chemical elements could be the substitute of the hydrogen that is lost during the reaction?

a)

Tungsten

b)

Chlorine

c)

Krypton

d)

Sodium

38.

The molecule benzene can undergo a chemical reaction known as nitration. To carry out this reaction there is need for the presence of two concentrated acids. Nitric acid is one, but, what is the other?

a)

Sulphuric Acid

b)

Hydrochloric Acid

c)

Citric Acid

d)

Phosphoric Acid

39.

During the nitration of benzene, the two acids involved react to form a cation. The formula of this positive ion is NO2+, but, what is the name of this?

a)

Deuterium

b)

Nitroglycerin

c)

Polonium

d)

Nitronium

40.

Due to its cyclic structure with a surrounding cloud of delocalised electrons, benzene is accurately described by which of the following chemical adjectives?

a)

Odorous

b)

Aromatic

c)

Pungent

d)

Smelly

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