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NEET Sample Paper NEET Sample Test Paper-30

  • question_answer
    The occurrence of the reaction is impossible if:

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

    B)              
     \[\Delta H\] is \[-ve;\] \[\Delta S\] is also \[-ve\]

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

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

    Correct Answer: D

    Solution :

    When \[\Delta G\] is \[+ve\] then reaction is not possible. \[\Delta G=\Delta H-T.\Delta S\] If \[\Delta H=+ve\] and \[\Delta S=+ve\]then \[\Delta G=+ve\]only when \[\Delta H>T.\Delta S\]and if \[\Delta H=+ve\] and \[\Delta S=-ve\] then \[\Delta G=+ve\]          


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