NEET Chemistry Substitution Reactions MCQ Question
Which of the following statements about substitution reactions in hydrocarbons is correct?
Substitution reactions lead to the formation of a sigma complex, which loses aromatic character.
Substitution reactions only occur in alkanes and not in aromatic compounds.
In substitution reactions, the electrophile is always a halogen molecule.
Substitution reactions do not involve the loss of any hydrogen atoms from the hydrocarbon.
Correct Answer
Detailed Explanation
Statement A is correct as it describes the formation of a sigma complex (arenium ion) in aromatic substitution, which temporarily loses its aromatic character. Statements B, C, and D are incorrect because substitution reactions can occur in aromatic compounds, the electrophile may vary, and hydrogen atoms are indeed lost during substitution.
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