Question

why solid nacl does not react with water

Answer 1

because it does not has the tendency to react with water

Answer 2

On addition to water the Na+ section of NaCl is attracted to the oxygen side of the water molecules, while the Cl- side is attracted to the hydrogens side of the water molecule. This causes the sodium chloride to split in water, and the NaCl dissolves into separate Na+ and Cl- atoms.