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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Sample Paper Topic Test - Chemical Equilibrium

  • question_answer
    \[A{{B}_{3}}(g)\] is dissociation as \[A{{B}_{3}}(g)A{{B}_{2}}(g)+\frac{1}{2}{{B}_{2}}(g),\] When the initial pressure of \[A{{B}_{3}}\] is 800 torr and the total pressure developed at equilibrium is 900 torr. What fraction of \[A{{B}_{3}}(g)\] is dissociated?

    A) 10%

    B) 20%            

    C) 25%

    D) 30%

    Correct Answer: C

    Solution :

    [c] \[A{{B}_{3}}(g)\rightleftharpoons A{{B}_{2}}(g)+\frac{1}{2}{{B}_{2}}(g)\]
    At eq.  \[800-x\]              \[x\]               \[x/2\]
    \[800-x+\frac{x}{2}=900\Rightarrow x=200\]
    % dissociated \[=\frac{200}{800}\times 100=25\]


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