RAJASTHAN ­ PET Rajasthan PET Solved Paper-2010

  • question_answer
    For the homogeneous reaction, \[4N{{H}_{3}}+5{{O}_{2}}4NO+6{{H}_{2}}O\] the equilibrium constant\[{{K}_{c}}\]has the units

    A)  \[cone{{.}^{+10}}\]          

    B)  \[cone{{.}^{+1}}\]

    C)  \[cone{{.}^{-1}}\]           

    D)  It is dimensionless

    Correct Answer: B

    Solution :

     For the given reaction,\[\Delta {{n}_{g}}={{n}_{p}}-{{n}_{r}}\] (where,\[{{n}_{p}}=\]number of moles of gaseous products and \[{{n}_{r}}=\]number of moles of gaseous reactants.) \[\Delta {{n}_{g}}=(6+4)-(4+5)=+1\] Units of \[{{K}_{c}}={{(concentration)}^{\Delta {{n}_{g}}}}\] \[={{(concentration)}^{+1}}\]


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