AQA A Level Chemistry Aromatic MCQ

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) (M_r = 227.0). The mass of TNT formed was...

•  1.35 g

•  3.33 g

•  3.65 g

• 12.34 g

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

• poly(propene)

•  benzene

•  graphite

•  sodium

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 (M_r = 134.0) formed from 18.4 g of methylbenzene (M_r = 92.0) is

• 26.8

• 16.1

• 10.7

• 7.4

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

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 (M_r) of benzene-1,4-dicarboxylic acid is...

• 164

• 166

• 168

• 170

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