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How many of the given statement are corr...

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.

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