JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank 2nd and 3rd law of thermodynamics and Entropy

  • question_answer
    The occurrence of a reaction is impossible if [AIIMS 1982, 91; MP PET 1997; MP PMT 1999; DPMT 2002]

    A)                 \[\Delta H\] is +ve ; \[\Delta S\] is also + ve but \[\Delta H<T\Delta S\]

    B)                 \[\Delta H\] is ? ve ;  \[\Delta S\] is also ? ve  but \[\Delta H\,>\,T\Delta S\]

    C)                 \[\Delta H\] is  ? ve ; \[\Delta S\] is + ve

    D)                 \[\Delta H\] is + ve ;  \[\Delta S\] is ? ve

    Correct Answer: D

    Solution :

              \[+\,\,ve\,\,\Delta H\]and \[-\,\,ve\,\,\Delta S\] both oppose the reaction.


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