Iodide is not a substance in its own right, it's an ion, though most of the substance it is found in are solids.
Iodine, the element that this ion is derived from is also a solid.
solid at room temp
It is a Yellow solid at room temperature
it is gas at room tempreature.
liquid
Gaseous
Solid.
Solid
solid
Solid.
gas
Solid
It is a gas.