JEE Main Chemistry question

Which of the following can be used to carry out an electrophilic aromatic substitution (by supplying or generating the electrophile)?

Answer: (C)

Solution

Oleum is a source of SO₃, which combines with H₂SO₄ to generate the electrophilic sulfonating species (HSO₃⁺/SO₃)

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Question ID VK-140300