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Which of the following compounds reacts slower in electrophilic substitution?

1. C6H5NO2
2. C6H5OH
3. C6H5CH3
4. C6H5NH2

Correct answer: C6H5NO2

Solution

Nitrobenzene (C6H5NO2) reacts slower in electrophilic substitution because the nitro group is an electron-withdrawing group, which deactivates the benzene ring by reducing its electron density.

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