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- Multiple ChoicePlease save your changes before editing any questions.
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.
- Multiple ChoicePlease save your changes before editing any questions.
In a reaction which gave a 27.0% yield, 5.00 g of methylbenzene were converted into the explosive 2,4,6-trinitromethylbenzene (TNT) (Mr = 227.0). The mass of TNT formed was...
1.35 g
3.33 g
3.65 g
12.34 g
- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following does not contain any delocalised electrons?
poly(propene)
benzene
graphite
sodium
- Multiple ChoicePlease save your changes before editing any questions.
The reaction between propanoyl chloride and benzene is an example of acylation.
Which is a correct representation of part of the mechanism of this reaction?
- Multiple ChoicePlease save your changes before editing any questions.
Use your understanding of the bonding in benzene to identify the compound that has the most exothermic enthalpy of hydrogenation.
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
This question is about the following reaction scheme which shows the preparation of polymer P. If 1.0 kg of benzene gave 0.98 kg of J, the percentage yield of J was...
64
66
68
70
- Multiple ChoicePlease save your changes before editing any questions.
In which one of the following reactions is the role of the reagent stated correctly?
TiO2 + 2C + 2Cl2 → TiCl4 + 2CO
TiO2 is an oxidising agent
HNO3 + H2SO4 → H2NO + HSO
HNO3 is a Brønsted-Lowry acid
CH3COCl + AlCl3 → CH3CO+ + AlCl
AlCl3 is a Lewis base
2CO + 2NO → 2CO2 + N2
CO is a reducing agent
- Multiple ChoicePlease save your changes before editing any questions.
The relative molecular mass (Mr) of benzene-1,4-dicarboxylic acid is...
164
166
168
170
- Multiple ChoicePlease save your changes before editing any questions.
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
16.80g
9.30 g
9.24 g
- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following can react both by nucleophilic addition and by nucleophilic substitution?