Electrophilic Aromatic Substitution Reactions MCQ

MCQ on Basics of Aromaticity

To be a Aromatic Compound molecule must

Molecule must fulfill following condition to be Aromatic.

• Compound must be cyclic
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• The molecule must be Planner. [ Possible when carbon in SP2 and SP ]
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• Every atom of cyclic chain must have an available p-orbital.
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• Should satisfy Huckel`s Rule [4n+2] pi electrons where, the number of electrons in the pi system must be 2, 6, 10, 14, 18, or a higher number i.e. integer value.
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Distinguishing the Aromatic and non Aromatic compounds?

Aromatic compounds

• Are Cyclic Structure
• Planar [ all atoms of cyclic ring in SP2 or SP Hybridization ]
• Satisfy Huckle`s rule [ 4n + 2  = pi ]
• Resonance stabilized
• Negative Bromine test [ Test for Unsaturation ]
• Dry Heating test burn with sooty flame

e.g.- Benzene, Phenol, Aniline, Naphthalene etc

Non Aromatic compounds

• May or may not Cyclic Structure
• May or may not Planar 
• Not Satisfy Huckle`s rule [ 4n + 2  = pi ]
• May or may not Resonance stabilized
• May or may not Positive Bromine test [ Test for Unsaturation ]
• Dry Heating test burn with non sooty flame

e.g.- Cyclopentane, Cyclobutene, Hexane etc

Stereoselective and Stereospecific Reaction

Stereoselective and Stereospecific Reaction