JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Law of equilibrium and Equilibrium constant

  • question_answer
    If in the reaction \[{{N}_{2}}{{O}_{4}}=2N{{O}_{2}},\,\alpha \] is that part of \[{{N}_{2}}{{O}_{4}}\] which dissociates, then the number of moles at equilibrium will be          [MP PET 1990; MH CET 2001; KCET 2005]

    A)                 3             

    B)                 1

    C)                 \[{{(1-\alpha )}^{2}}\]   

    D)                 \[(1+\alpha )\]

    Correct Answer: D

    Solution :

           \[\underset{(1-\alpha )}{\mathop{\underset{1}{\mathop{{{N}_{2}}{{O}_{4}}}}\,}}\,\]⇌ \[\underset{2\,\alpha }{\mathop{\underset{0}{\mathop{2N{{O}_{2}}}}\,}}\,\]                 total mole at equilibrium \[=(1-\alpha )+2\alpha \]\[=1+\alpha \]


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