Aromaticity and Huckel's Rule

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Chemistry, Science, Physics
•
11th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary structural feature that defines an aromatic compound?
Presence of a pleasant odor
Fully conjugated unsaturated ring system
High molecular weight
Presence of a metal atom
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a requirement for a molecule to be considered aromatic?
The molecule must be fully planar
The molecule must be fully conjugated
The molecule must have an odd number of carbon atoms
The number of π electrons must satisfy Huckel's rule
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Huckel's rule, how many π electrons are needed for a compound to be aromatic?
4n
4n+2
2n+1
3n
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the 4n+2 rule in determining aromaticity?
It calculates the number of carbon atoms in the ring
It determines the molecular weight of aromatic compounds
It specifies the number of π electrons needed for aromaticity
It predicts the color of aromatic compounds
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following compounds is likely to be anti-aromatic?
A compound with 14 π electrons
A compound with 10 π electrons
A compound with 4 π electrons
A compound with 6 π electrons
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of aromaticity, what role do lone pairs play in heterocyclic compounds?
They always disrupt aromaticity
They can participate in resonance if needed to achieve aromaticity
They are irrelevant to aromaticity
They only participate in resonance in non-aromatic compounds
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following heterocyclic compounds is aromatic due to the involvement of a lone pair in resonance?
Pyridine
Cyclohexane
Furan
Ethylene
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