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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Critical Thinking

  • question_answer
    Total number of moles for the reaction \[2HI\,\,\]⇄ \[{{H}_{2}}+{{I}_{2}}.\] if \[\alpha \] is degree of dissociation is         [CBSE PMT 1996]

    A)                 2             

    B)                 \[2-\alpha \]

    C)                 1             

    D)                 \[1-\alpha \]                

    Correct Answer: C

    Solution :

               \[\begin{matrix}    {}  \\    \text{Initial  }  \\ \end{matrix}\underset{\,\,\text{2}}{\mathop{2HI}}\,\] ⇌ \[\underset{0}{\mathop{{{H}_{2}}}}\,+\underset{0}{\mathop{{{I}_{2}}}}\,\]                                 At equilibrium \[2-\alpha \]  \[\frac{\alpha }{2}\]   \[\frac{\alpha }{2}\] \[=2-\alpha +\frac{\alpha }{2}+\frac{\alpha }{2}=2\].


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