AIIMS 2019 Chemistry Electrophilic Substitution Reactions MCQ Question
In electrophilic substitution reaction, —CH₃ group shows +R and +I effects, therefore, it is ortho and para-directing. Due to steric hindrance at the ortho position, para isomer is formed as the major product.
True
False
Cannot be determined
None of the above
Correct Answer
Detailed Explanation
The statement is true because the —CH₃ group exhibits both +R (resonance) and +I (inductive) effects, making it an ortho- and para-directing substituent in electrophilic aromatic substitution reactions. However, steric hindrance at the ortho position often leads to the formation of the para isomer as the major product. Options B and C are incorrect as they misrepresent the directing effects of the —CH₃ group and the influence of steric factors, respectively. Understanding these concepts is crucial for predicting the outcomes of electrophilic substitution reactions in aromatic compounds.
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