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Which of the following is not one of the Hückel's criteria for aromaticity?


A) The molecule must be cyclic.
B) The molecule must be planar.
C) The molecule must be completely conjugated.
D) The molecule must have 4n pi electrons.

Correct Answer

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Which of the following ions is aromatic? Which of the following ions is aromatic? A) Only I and II B) Only II and III C) Only III and IV D) Only II and IV


A) Only I and II
B) Only II and III
C) Only III and IV
D) Only II and IV

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Which of the following statements about benzene is true?


A) Benzene is a saturated hydrocarbon.
B) Benzene undergoes addition reactions.
C) Benzene has five degrees of unsaturation.
D) Benzene undergoes substitution reactions.

Correct Answer

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What is the correct structure for anisole? What is the correct structure for anisole? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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Which of the following compounds is not aromatic? Which of the following compounds is not aromatic? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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Which of the following heterocycles is not aromatic? Which of the following heterocycles is not aromatic? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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Why is the following compound not aromatic? Why is the following compound not aromatic? A) It has 4n electrons. B) It is not cyclic. C) It has 4n+2 electrons. D) The p electron system is not continuous.


A) It has 4n electrons.
B) It is not cyclic.
C) It has 4n+2 electrons.
D) The p electron system is not continuous.

Correct Answer

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Which of the following molecules has the most acidic hydrogen atoms? Which of the following molecules has the most acidic hydrogen atoms? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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What is the correct structure for 1-bromo-2,4-dimethoxybenzene? What is the correct structure for 1-bromo-2,4-dimethoxybenzene? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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What orbitals are used to form the indicated bond? What orbitals are used to form the indicated bond? A) sp<sup>3</sup> B) sp<sup>2</sup> C) p D) sp<sup>3</sup> and sp<sup>2</sup>


A) sp3
B) sp2
C) p
D) sp3 and sp2

Correct Answer

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Where do the protons in benzene appear in the 1H NMR spectrum?


A) Around 1600 cm-1
B) Around 120 ppm
C) Around 0 ppm
D) Around 7 ppm

Correct Answer

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