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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

  • question_answer
    On the basis of Le-Chatelier's principle, predict which of the following conditions would be unfavorable for the formation of \[S{{O}_{3}}\]? Given that: \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\,\,\Delta H=-42kcal\]

    A)  Low temperature

    B)  High pressure

    C)  High temperature

    D)  High concentration of \[S{{O}_{2}}\]

    Correct Answer: C

    Solution :

    Consider the equilibrium \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\rightleftharpoons 2S{{O}_{3}}(g);\] \[\Delta H=-42kcal\] To get better yield of \[S{{O}_{3}},\] one must keep (i) high pressure (ii) low temperature (iii) high concentration of reactants So, high temperature is not the favourable condition for the better yield of \[S{{O}_{3}}\].


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