Which of the following has `DeltaS^(@)` greater than zero

Options

A. `CaO(s)+CO_(2)(g)hArrCaCO_(3)(s)`
B. `NaCl(aq)hArrNaCl(s)`
C. `NaNO_(3)(s)hArrNa^(+)(aq)+NO_(3)^(-)(aq)`
D. `N_(2)(g)+3H_(2)(g)hArr2NH_(3)(g)`

Answer

C

Explanation

For choice `(C )` i.e.,
`NaNO_(3)hArrNa^(+)(aq)+NO_(3)^(-)(aq)`
`DeltaS^(@)` is positive as only in this process entropy of the system increases.