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NEETChemistryThermodynamics (C)

Match List I with List II regarding the entropy change ( S ) and its primary reason for various processes: List I (Process) List II (Reason for entropy change) A. Hard boiling of an egg I. S > 0 due to structural unfolding/denaturation of complex molecules B. Thermal decomposition of solid CaCO ₃ II. S C. Formation of H ₂ molecule from H atoms III. S > 0 due to an increase in the number of gaseous species D. Mixing o

Options

  1. AA-II, B-III, C-I, D-IV
  2. BA-I, B-IV, C-II, D-III
  3. CA-II, B-IV, C-III, D-I
  4. DA-I, B-III, C-II, D-IV

Correct answer

D. A-I, B-III, C-II, D-IV

Step-by-step solution

A. Hard boiling of an egg involves the denaturation of proteins. The helical structure unfolds into a more random coiled form, leading to an increase in entropy ( S > 0 ). Hence, A matches with I. B. Thermal decomposition of solid CaCO ₃ produces solid CaO and gaseous CO ₂ . The formation of a gaseous product increases the randomness ( S > 0 ). Hence, B matches with III. C. Formation of an H ₂ molecule from two H atoms ( 2 H _ ( g ) H _ 2( g ) ) decreases the number of particles, thus decreasing entropy ( S D. Mixi

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