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JEE Main & Advanced AIEEE Solved Paper-2006

  • question_answer
    Phosphorus pentachloride dissociates as follows, in a closed reaction vessel, \[PC{{l}_{5}}(g)PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] If total pressure at equilibrium of the reaction mixture is p and degree of dissociation of \[PC{{l}_{5}}\] is\[x\], the partial pressure of\[PC{{l}_{3}}\]will be     AIEEE  Solved  Paper-2006

    A)  \[\left( \frac{x}{x+1} \right)P\]                

    B)  \[\left( \frac{2x}{1-x} \right)P\]               

    C)         \[\left( \frac{x}{x-1} \right)P\] 

    D)        \[\left( \frac{x}{1-x} \right)P\]

    Correct Answer: A

    Solution :

    \[\underset{(1-x)}{\mathop{PC{{l}_{5}}(g)}}\,\underset{x}{\mathop{PC{{l}_{3}}(g)}}\,+\underset{x}{\mathop{C{{l}_{2}}(g)}}\,\] Total number of moles at equilibrium \[=(1-x)+x+x=1+x\] \[{{P}_{PC{{l}_{3}}}}=\left[ \frac{x}{1+x} \right]\times P\]


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