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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Mock Test - Chemical Equilibrium

  • question_answer
    'a' moles of \[PC{{l}_{5}}\], undergoes, thermal dissociation as:\[PC{{l}_{5}}\rightleftarrows PC{{l}_{3}}+C{{l}_{2}}\], the mole fraction of \[PC{{l}_{3}}\]at equilibrium is 0.25 and the total pressure is 2.0 atmosphere. The partial pressure of \[C{{I}_{2}}\]at equilibrium is:

    A) 2.5       

    B) 1.0

    C) 0.5                   

    D) None of these

    Correct Answer: C

    Solution :

    [c] \[PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}}\]
    \[at\,\,t=0\] \[a\] \[0\] \[0\]
    \[t=tq\] \[a-x\] \[x\] \[x\]
      \[{{P}_{PC{{l}_{3}}}}={{X}_{PC{{l}_{3}}}}\times {{P}_{T}}=0.25\times 2=0.5\,\,atm\] \[{{P}_{PC{{l}_{3}}}}={{P}_{C{{l}_{2}}}}=0.5atm\]


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