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NEET Sample Paper NEET Sample Test Paper-59

  • question_answer
    9.2 grams of is taken in a closed one litre vessel and heated fill the following equilibrium is reached\[{{N}_{2}}{{O}_{4}}(g)\,\,2N{{O}_{2}}(g)\,\]. At equilibrium  is dissociated what is the equilibrium constant (in mol/ L) \[(molecular\,\,weight\,\,of\,{{N}_{2}}{{O}_{4}}=92)\]

    A) 0.1      

    B)               0.2     

    C) 0.4                               

    D) 2

    Correct Answer: B

    Solution :

    [b] 0.2 Initial \[[{{N}_{2}}{{O}_{4}}]=\frac{9.2}{92}\,mol{{L}^{-1}}\] \[=0.1\text{ }mol{{L}^{-1}}\] At equilibrium (after 50% dissociation) \[[{{N}_{2}}{{O}_{4}}]=0.05M,[N{{O}_{2}}]=0.1M\] \[K=\frac{{{[N{{O}_{2}}]}^{2}}}{[{{N}_{2}}{{O}_{4}}]}\] \[K=\frac{{{[0.1]}^{2}}}{0.05}=0.2\]


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