WorksheetsBenzene
Total questions: 20
Worksheet time: 32mins
1,3-dinitrobenzene can be prepared by heating nitrobenzene with a mixture of fuming nitric acid and concentrated sulphuric acid. The reaction can be represented by the following equation. If the yield of the reaction is 55%, the mass of 1,3-dinitrobenzene produced from 12.30 g of nitrobenzene is ...
16.90 g
16.80 g
9.30 g
9.24 g
The relative molecular mass (Mr) of benzene-1,4-dicarboxylic acid is?
164
166
168
170
Use your understanding of the bonding in benzene to identify the compound that has the most exothermic enthalpy of hydrogenation.
A
B
C
D
Ethanoyl chloride reacts with methylbenzene forming compound X according to the equation below. If the experimental yield is 40.0%, the mass in grams of X (Mr = 134.0) formed from 18.4 g of methylbenzene (Mr = 92.0) is ...
26.8
16.1
10.7
7.4
The nitration of benzene uses a nitrating mixture of concentrated nitric acid and concentrated sulfuric acid.
HNO3 + 2H2SO4 → NO2+ + H3O+ + 2HSO4–
Which statement is correct?
HNO3 acts as a base.
HNO3 acts as a catalyst.
HNO3 acts as an electrophile.
HNO3 acts as a reducing agent.
Which one of the following can react both by nucleophilic addition and by nucleophilic substitution?
A
B
C
D
Which one of the following does not contain any delocalised electrons?
poly(propene)
benzene
graphite
sodium
Who discovered benzene?
August Kekulé
Michael Faraday
Kathleen Lonsdale
Dmitri Mendeleev
The empirical formula of benzene is
CH
C2H4
C6H6
C6H12
How many electrons are there in the delocalised pi electron system in benzene?
3
6
9
12
What is the total number of isomers of dichlorobenzene C6H4Cl2?
2
3
4
5
Which of the following statements about benzene is incorrect?
A total of six electrons per molecule are delocalised
All of the carbon-carbon bonds are the same length
The bond angles are all 120°
The empirical formula is C6H6
What form of reaction mechanism is benzene normally involved in?
Electrophillic substitution
Electrophillic addition
Electophillic addition elimination
Nucleophilic substitution
The formula for the nitronium ion is
NO2+
NO2
NO2+
NO22+
When benzene reacts with an acyl chloride, in the presence of an AlCl3 catalyst, why must the conditions be kept anhydrous?
To prevent a dilution of the reactants
To prevent a condensation reaction from occurring
To prevent dehydration
To prevent hydrolysis
When benzene reacts with ethanoic anhydride, the products are ...
ethyl benzoate and ethanoic acid
methyl benzoate and methanoic acid
methyl benzoate and ethanoic acid
methyl benzoate and methanoic acid
An electrophile is ...
an electron pair donor
an electron pair acceptor
a negatively charged ion
a proton donor
Which statement about benzene is not true?
It can be extracted from whale oil
It is a planar, hexagonal molecule
It is a relatively stable molecule because of the rings of delocalised electrons
It can conduct electricity because of its delocalised electrons
When cyclohexene is hydrogenated, the enthalpy change of hydrogenation is -120 kJ mol-1. The enthalpy of hydrogenation of benzene is ...
-240 kJ mol-1
-360 kJ mol-1
-208 kJ mol-1
-152 kJ mol-1
A reagent that could be used to distinguish between benzene and cyclohexene is ...
Acidified K2Cr2O7
Tollens reagent
Bromine water
Sodium carbonate
