It is both: It is a physical property because the solid salt becomes part of the liquid state of the water. It is a chemical property because the act of dissolving in water changes the salt (NaCl) into separate ions.
Neither, Sodium Chloride (NaCl) is a salt (table salt) made by reacting the metal Sodium with the Gas Chlorine. The substance, Sodium Chloride, has both physical and chemical properties but is not a property itself.
Neither. Well, it definitely wouldn't be a physical property because the outside features don't change. It WOULD be a chemical property if , for ex. bubbling water. The act of dissolving salt doesn't change anything.
Salt is a type of compound, not a "chemical property." Salts do have certain characteristic properties... they tend to be brittle rather than malleable, they tend to have high melting points, and they tend to be more soluble in water than in organic solvents.