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In which reaction there will be increase in entropy
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a
Na(s)+H2O(i)→NaOH(l)+12H2(g)
b
Ag+(aq)+Cl(aq)→AgCl(s)
c
H2(g)+12O2(g)→H2O(I)
d
Cu2+(aq)+4NH3(g)→CuNH342+(aq)
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Correct option is A
In reaction (a) Na (s) reacts with H2O(l) to give NaOH(l) and 12H2(g)Since, the entropy of a gas is higher than that of liquid and the entropy of liquid is higher than that of solid, therefore, the change in entropy of this reaction increases.
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