Incorrect statement regarding aromaticity among the following is:

1. The compound should have a planar structure.
2. The π–electrons of the compound are completely delocalized in the ring.
3. The total number of π–electrons present in the ring should be equal to (4n + 2) π electrons, where n = 0, 1, 2 … etc. This is known as Huckel’s rule. 
4.  The compound should have a linear structure.

Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
 88%
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Non aromatic molecule(s)among the following is/are :

1. 2.
3. 4. All of the above
Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
 76%
From NCERT
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Incorrect statement towards reactivity of benzene is:

1. It undergoes electrophilic substitution reactions very easily.
2. Nucleophiles are attracted by a benzene ring.
3. Benzene is a planar molecule. 
4. It has 12 sigma bonds.

Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
 69%
From NCERT
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Benzene is extraordinarily stable, though it contains three double bonds, because of :

1. Delocalized protons

2. Delocalized neutrons

3. Resonance

4. None of the above.

Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
 93%
From NCERT
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The numbers of structural isomers of C4H8 (with one double bond) and C5H8 (with one triple bond) are:

1. C4H8=3;C5H8=3

2. C4H8=4;C5H8=4

3. C4H8=3;C5H8=4

4.C4H8=4;C5H8=3

Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
From NCERT
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