Organic Chemistry Multiple Choice Questions and Answers – Aromatic Hydrocarbons

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Questions
1 Identify the correct statement which is related to aromatic hydrocarbon?
A It has only sigma bonds
B It has only pi bonds
C It has a sigma and two pi bonds
D It has a sigma and delocalized pi bond

Answer: It has a sigma and delocalized pi bond
2 Select the incorrect option.
A The aromatic hydrocarbon has a pleasant aroma (smell)
B Some of the aromatic compounds are ring-shaped
C Aromatic hydrocarbon can be either mono or polycyclic
D Benzene is the simplest hydrocarbon

Answer: Some of the aromatic compounds are ring-shaped
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3 Which among the following is not a property of aromatic hydrocarbon?
A These compounds have very good aromaticity
B These compounds have excellent stability
C These compounds do not undergo nucleophilic substitutions but they undergo electrophilic substitutions
D There exists a strong ratio between carbon and hydrogen

Answer: These compounds do not undergo nucleophilic substitutions but they undergo electrophilic substitutions
4 Arenes does not undergo ___________
A Dehydrogenation
B Coupling reaction
C Halogenation
D Cyclo additions

Answer: Dehydrogenation
5 Which among these is not a representative arene compound?
A Durene
B Picric chloride
C Aspirin
D Mesitylene

Answer: Picric chloride
6 Which among these is the simplest example for polycyclic arenes?
A Benzacephenanthrylene
B Naphthalene
C Pyrene
D Dibenz-anthracene

Answer: Naphthalene
7 Arenes are polar.
A True
B False

Answer: False
8 Arenes are _________
A volatile
B Water soluble
C Non-carcinogenic
D Mostly gases

Answer: volatile
9 The main sources of these arenes are _________
A Petroleum
B Biogas and petroleum
C Petroleum and coal tar
D Natural gas

Answer: Petroleum and coal tar
10 Benzene has a stronger Vander-Waal’s force than Methylbenzene.
A False
B True

Answer: False

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