The correct option(s) about entropy ( S ) is(are) [ R = gas constant, F = Faraday…

Chemistry · JEE Advanced · NTA ExamsChemical Thermodynamics

The correct option(s) about entropy (S) is(are)
[R = gas constant, F = Faraday constant,
T = Temperature]
  1. For the reaction, M(s) + 2H+(aq) → H2(g) + M2+(aq),
    if , then the entropy change of the reaction is R (assume that entropy and internal energy changes are temperature independent).
  2. The cell reaction,
    Pt(s)|H2(g, 1 bar) | H+(aq, 0.01 M)|| H+(aq, 0.1 M)|H2(g, 1 bar) | Pt(s), is an entropy driven process.
  3. For racemization of an optically active
    compound, DS > 0 .
  4. DS > 0, for [Ni(H2O)6]2+ + 3en [Ni(en)3]2+ + 6H2O
    (where en = ethylenediamine).

Answer

(D) D S > 0, for [Ni(H 2 O) 6 ] 2+ + 3 en → [Ni( en ) 3 ] 2+ + 6H 2 O (where en = ethylenediamine).

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