NEET Sample Paper NEET Sample Test Paper-9

  • question_answer In the reversible reaction\[2N{{O}_{2}}{{N}_{2}}{{O}_{4}}\] the rate of disappearance of \[N{{O}_{2}}\] is equal to

    A)  \[\frac{2{{k}_{1}}}{{{k}_{2}}}\,{{\left[ N{{O}_{2}} \right]}^{2}}\]

    B)  \[2{{k}_{1}}{{[N{{O}_{2}}]}^{2}}-2{{k}_{2}}[{{N}_{2}}{{O}_{4}}]\]

    C)  \[2{{k}_{1}}{{[N{{O}_{2}}]}^{2}}-{{k}_{2}}[{{N}_{2}}{{O}_{4}}]\]

    D)  \[(2{{k}_{1}}-{{k}_{2}})\,[N{{O}_{2}}]\]

    Correct Answer: B

    Solution :

    \[2N{{O}_{2}}{{N}_{2}}{{O}_{4}}\] Rate \[=\frac{1}{2}\frac{d\,[N{{O}_{2}}]}{dt}\] \[={{k}_{1}}{{[N{{O}_{2}}]}^{2}}-{{k}_{2}}[{{N}_{2}}{{O}_{4}}]\] Rate of disappearance of \[N{{O}_{2}}\] i.e.             \[-\frac{d[N{{O}_{2}}]}{dt}=2{{k}_{1}}\,\,{{[N{{O}_{2}}]}^{2}}-2{{k}_{2}}[{{N}_{2}}{{O}_{4}}]\]

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