How many of the given statement are correct `:`
`I :` Molar entropy of a substance follows the order `(S_(m))_("Solid")lt (S_(m))_("liquid")lt(S_(m))_("gas")`
`II :` Entroy change of system for the reaction `H_(2)(g) rarr 2H(g) `is `+ve`.
`III. ` Molar entropy of a non`-` crystalline solid will be zero at absolute zero.
`IV :` If the path of an irreversible process is reversed, then both system and surrounding shall be restored to their original states.
`V: ` Refractive index and molarity are intensive properties.

Options

A. 2
B. 3
C. 4
D. 5

Answer

2

Explanation

`I.` Molar entropy of gas is much greater than that of solide and liquid.
`II.` Entropy change is positive if `Deltan_(g)` is positive.
`III.` Molar entropy of a crystalline solide will be zero at absolute zero.
`IV.` In irreversible process both system and surrounding are not restored if path is reversed.
`V.` Refractive index and molarity are intensive properties.