Which of the following substituents is electron-withdrawing when added to a benzene ring?
Correct answer: A. - NO2
- A. - NO2
- B. - NH2
- C. - OH
- D. - COOH
Explanation
The nitro group (NO2) is electron-withdrawing because it has a high electronegativity. The electronegativity of the nitrogen atom in the nitro group pulls electrons away from the benzene ring, making the ring less electron-rich and therefore less reactive towards electrophiles.
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About Chemistry of Hydrocarbons
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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