NEET Sample Paper NEET Sample Test Paper-39

  • question_answer Which of the following statements is correct tor the spontaneous adsorption of a gas?

    A) \[\Delta S\]is negative and therefore\[\Delta H\]should be highly positive.

    B)  \[\Delta S\] is negative and therefore,\[\Delta H\]should be highly negative.

    C) \[\Delta S\]is positive and therefore\[\Delta H\]should be negative.                            

    D)  \[\Delta S\]is positive and therefore \[\Delta H\]should also be highly positive.

    Correct Answer: B

    Solution :

     For adsorption \[\Delta S<0\]and for a spontaneous change\[\Delta G=-ve\] Hence\[\Delta \Eta \]should be highly negative which is clear from the equation \[\Delta G=\Delta H-T\Delta S\] \[=-\Delta \Eta -\Tau (-\Delta S)=-\Delta H+T\Delta S\] So if \[\Delta \Eta \]is highly negative, \[\Delta G\]will also be -ve,


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