Replacement of Cl in chlorobenzene to give phenol requires drastic conditions, but Cl in 2,4-dinitrochlorobenzene is readily replaced. This is because

Question

$-NO_2$ group makes the ring electron-rich at ortho and para positions

$-NO_2$ group withdraws electrons from meta position

$-NO_2$ donates electrons at meta position

$-NO_2$ withdraws electrons from ortho and para positions

Solution

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