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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.
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...
Which one of the following does not contain any delocalised electrons?
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?
Use your understanding of the bonding in benzene to identify the compound that has the most exothermic enthalpy of hydrogenation.
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
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...
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
The relative molecular mass (Mr) of benzene-1,4-dicarboxylic acid is...
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...
Which one of the following can react both by nucleophilic addition and by nucleophilic substitution?