NEET Sample Paper NEET Sample Test Paper-39

  • question_answer ) For the gas phase reaction, \[PC{{l}_{5}}(g)\rightleftharpoons PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] Which of the following conditions are correct?

    A) \[\Delta H>0\]and \[\Delta S>0\]

    B) \[\Delta H<0\]and\[\Delta S<0\]

    C) \[\Delta H>0\]and\[\Delta S<0\]

    D) \[\Delta H=0\]and\[\Delta S<0\]   

    Correct Answer: A

    Solution :

     \[\Delta H=+ve\]and \[\Delta S=+ve.\]The disorder increases with increase in moles. \[PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}};\Delta \Eta =+ve\](dissociation)

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