Explain why 4-nitrophenol has a significantly higher melting point compared to 2-nitrophenol.

4-nitrophenol has a significantly higher melting point because 2-nitrophenol has an activating group in the ortho position.

4-nitrophenol has a significantly higher melting point because it has a deactivating group in the para position.

4-nitrophenol has a significantly higher melting point because 2-nitrophenol has weaker intermolecular H-bonding.

4-nitrophenol has a significantly higher melting point because 2-nitrophenol has unstable resonance contributors.