How many of the given statement are correctI: Molar entropy of a substance follows the order Smsolid

I. Molar entropy of gas is much greater than that of solid and liquid.II. Entropy change is positive if  Δng is positive.III. Molar entropy of a crystalline solid will be zero at absolute zero.IV. Ina reversible cyclic process both system and surroundings shall be restored to their original states.V. Refractive index and molarity are intensive properties.