Solid sodium acetate, ${\mathrm{NaC}}_2{\mathrm{H}}_3{\mathrm{O}}_2$ , is what type of solid?

A crystalline solid with no color or smell, sodium acetate is most frequently found as the trihydrate ${\mathrm{NaC}}_2{\mathrm{H}}_3{\mathrm{O}}_2\cdot 3{\mathrm{H}}_2\mathrm{O}$. When one or more water molecules are physically combined with the molecule of another material, a hydrate is created.

Therefore, Solid sodium acetate, ${\mathrm{NaC}}_2{\mathrm{H}}_3{\mathrm{O}}_2$, is type of Ionic solid.

So, option A is correct.