Benzene

Last updated: 03/03/2020

WJEC A-Level Chemistry Unit 4.2 – Aromaticity Benzene

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Question 1 of 35

1. Question
What type of hydrocarbon is benzene?
- Unsaturated
- Haloalkane
- Saturated
- Alkane
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Question 2 of 35

2. Question
What is the definition of an aromatic hydrocarbon?
- A hydrocarbon with a benzene ring
- A straight chained hydrocarbon
- A ringed hydrocarbon
- A hydrocarbon with a carbon-carbon double bond
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Question 3 of 35

3. Question
What is the molecular formula of benzene?
- $C_6H_6$
- $C_6H_{12}$
- $C_6H_3$
- $C_7H_7$
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Question 4 of 35

4. Question
What is a benzene derivative?
- A benzene ring that has undergone a substitution reaction
- A benzene ring that has undergone an addition reaction
- A benzene ring that has undergone a reduction reaction
- A benzene ring that has undergone an oxidation reaction
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Question 5 of 35

5. Question
Within benzene, what shape is the ringed carbon atoms?
- Hexagon
- Circle
- Triangle
- Square
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Question 6 of 35

6. Question
Describe the carbon bond lengths within benzene.
- All carbon bond lengths are the same
- The length of carbon bonds will depend on the number of hydrogen atoms attached
- Carbon bond lengths will alternate
- All carbon bond lengths are different
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Question 7 of 35

7. Question
Describe the polarity of benzene.
- Benzene is non-polar
- Benzene is polar
- Benzene is only polar in water
- Benzene is only polar in acids
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Question 8 of 35

8. Question
Which of the following represents the kekule model of benzene?
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Question 9 of 35

9. Question
Which of the following represents the kekule model of benzene?
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Question 10 of 35

10. Question
Which of the following represents the kekule model of benzene?
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Question 11 of 35

11. Question
How does a delocalised system of electrons form within benzene?
- Overlapping carbon p-orbitals containing one electron
- Overlapping hydrogen s-orbitals containing one electron
- Overlapping carbon p-orbitals containing two electrons
- Overlapping carbon s-orbitals containing one electron
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Question 12 of 35

12. Question
Describe the difference between the electrophilic addition reactions of cyclohexene and benzene.
- Cyclohexene can undergo addition reactions whereas benzene cannot undergo addition reactions
- Both can only complete addition reactions under high temperatures and pressures
- Benzene can undergo addition reactions whereas cyclohexene cannot undergo addition reactions
- Both undergo the same addition reactions
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Question 13 of 35

13. Question
Compare the stability of cyclohexene and benzene.
- Benzene is more stable than cyclohexene
- Benzene is less stable than cyclohexene
- Benzene and cyclohexene are very unstable
- Benzene and cyclohexene are very stable
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Question 14 of 35

14. Question
Compare the electron density of benzene and the electron density of cyclohexene.
- Benzene is more electron dense than cyclohexene
- Both have roughly the same electron density
- Cyclohexene is more electron dense than benzene
- Both contain no electrons
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Question 15 of 35

15. Question
What is the definition of hydrogenation?
- The reaction with hydrogen
- The removal of hydrogen
- The removal of water
- The reaction with water
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Question 16 of 35

16. Question
Write the equation for the hydrogenation of cyclohexene.
- $C_6H_{10} + H_2 – > C_6H_{12}$
- $C_6H_{10} + 2H_2 – > C_6H_{12}$
- $C_6H_{12} + H_2 – > C_6H_{10}$
- $2C_6H_{10} + H_2 – > 2C_6H_{12}$
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Question 17 of 35

17. Question
Compare the enthalpy of hydrogenation of cyclohexene and benzene.
- Hydrogenation of benzene is less exothermic compared to cyclohexene
- Hydrogenation of benzene is more exothermic compared to cyclohexene
- Both do not react with hydrogen
- Both have the same enthalpy values
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Question 18 of 35

18. Question
- Benzoic acid
- Benzanoic acid
- Benzaldehyde
- 1-methylbenzoic acid
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Question 19 of 35

19. Question
- Benzaldehyde
- Benzoic acid
- 2-benzaldehyde
- benz-1-aldehyde
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Question 20 of 35

20. Question
- 1-bromo-3-methylbenzene
- 1-methyl-3-bromobenzene
- 3-bromo-1-methylbenzene
- 1-methyl-3-bromobenzene
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Question 21 of 35

21. Question
- Nitrilebenzene
- Nitrobenzene
- 1-nitrilebenzene
- Benzonitrile
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Question 22 of 35

22. Question
- 1,4-dimethylbenzene
- 1,4-methyl benzene
- 1,3-dimethylbenzene
- 1,3-methylbenzene
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Question 23 of 35

23. Question
- 1,4-dibromobenzene
- 1,4-bromobenzene
- 1,3-dibromobenzene
- 1,3-bromobenzene
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Question 24 of 35

24. Question
- 3-methylbenzoic acid
- 1-methylbenzoic acid
- 4-methylbenzoic acid
- 2-methylbenzoic acid
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Question 25 of 35

25. Question
- 1-bromo-2,6-dinitrobenzene
- 1,3-dinitro-2-bromobenzene
- 2,5-dinitro-1-bromobenzene
- 2,6-dinitro-1-bromobenzene
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Question 26 of 35

26. Question
- Methylbenzene
- Ethylbenzene
- 2-ethylbenzene
- 2-methylbenzene
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Question 27 of 35

27. Question
- 3-bromo-5,6-dichloro-2,4-dimethyl benzaldehyde
- 3-bromo-5,6-dichloro-2,4-dimethyl benzoic acid
- 5,6-dichloro-3-bromo2,4-dimethyl benzoic acid
- 5,6-dichloro-3-bromo2,4-dimethyl benzaldehyde
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Question 28 of 35

28. Question
- Ethylbenzene
- Methylbenzene
- 2-ethylbenzene
- 2-methylbenzene
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Question 29 of 35

29. Question
- 1-chloro-2-nitrobenzene
- 2-chloro-1-nitrobenzene
- 1-nitro-2-chlorobenzene
- 2-nitro-1-chlorobenzene
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Question 30 of 35

30. Question
- Chlorobenzene
- 2-chlorobenzene
- Bromobenzene
- Dichlorobenzene
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Question 31 of 35

31. Question
- Bromobenzene
- 3-bromobenzene
- 2-bromobenzene
- bromo-1-benzene
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Question 32 of 35

32. Question
- Iodobenzene
- 2-iodobenzene
- Iodo-2-benzene
- Iodo-1-benzene
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Question 33 of 35

33. Question
- 1-bromo-4-chlorobenzene
- 1-chloro-4-bromobenzene
- 1-bromo-3-chlorobenzene
- 1-chloro-3-bromobenzene
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Question 34 of 35

34. Question
- 1,2-dibromo-3-chlorobenzene
- 3,4-dibromobenzene-1-chlorobenzene
- 1-chloro-2,3-dibromobenzene
- 3-chloro-3,4-dibromobenzene
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Question 35 of 35

35. Question
- Nitrobenzene
- Nitro-2-benzene
- Nitro-1-benzene
- 2-nitrobenzene
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